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 [Search a list of Patent Appplications for class 546]   CLASS 546,ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES
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SECTION I - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

In this series of classes, Class 546 is to be considered as an integral part of Class 260 (after subclass 544) and follows the schedule hierarchy retaining all pertinent definitions and class lines of Class 260.

SUBCLASSES

[List of Patents for class 546 subclass 1]    1Hetero ring is six-membered consisting of one nitrogen and five carbons:
 This subclass is indented under subclass 1.  Compounds under Class 540, ... which contain a six-membered hetero ring consisting of one nitrogen and five carbon atoms.

SEE OR SEARCH CLASS:

588Hazardous or Toxic Waste Destruction or Containment,   subclasses 300 through 415for the chemical destruction of hazardous or toxic waste.
  
[List of Patents for class 546 subclass 2]    2Heavy metal or aluminum containing:
 This subclass is indented under subclass 1.  Compounds which include aluminum or a metal having a specific gravity greater than four.
(1) Note. Arsenic is considered a metal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13,for compounds containing boron.
14,for compounds containing silicon.
  
[List of Patents for class 546 subclass 3]    3Arsenic containing:
 This subclass is indented under subclass 2.  Compounds which contain arsenic.
  
[List of Patents for class 546 subclass 4]    4The metal bonded directly to carbon, which carbon is a ring carbon of the six-membered hetero ring or which carbon is attached directly or indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 2.  Compounds wherein the metal is bonded directly (a) to a ring carbon of the six-membered hetero ring, or (b) to a carbon atom which additionally is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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(2) Note. Excluded from this subclass are compounds such as, e.g., Figure 1 below which require "doubling back" through the metal to satisfy the conditions necessary for inclusion here.:

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[List of Patents for class 546 subclass 5]    5The metal is bonded directly to chalcogen of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens, which group is attached directly or indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 2.  Compounds wherein the metal is bonded directly to the singly bonded chalcogen of a group, in which the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), which group is additionally attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. These compounds are usually referred to as "salts".
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 6]    6The metal is bonded directly to chalcogen which chalcogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 2.  Compounds wherein the metal is bonded directly to a chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 7]    7The chalcogen is bonded directly to ring carbon of a quinoline ring system (including hydrogenated):
 This subclass is indented under subclass 6.  Compounds wherein the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to a ring carbon of a quinoline ring system; said ring system, having the following basic structure, may contain double bonds between ring members:

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 8]    8The metal is in an anion and the six-membered hetero ring is in a cation:
 This subclass is indented under subclass 2.  Compounds wherein the metal is in an anion, i.e., a group with a negative charge, and the six-membered hetero ring is in a cation, i.e., a group with a positive charge.
(1) Note. These compounds are usually pyridinium salts of metallates, e.g.,

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(2) Note. An additional example of a compound provided for herein is:

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[List of Patents for class 546 subclass 9]    9The metal is bonded directly to halogen in the anion:
 This subclass is indented under subclass 8.  Compounds in which the metal in the anion is bonded directly to halogen; i.e., a metal-halogen bond.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 10]    10Polycyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 2.  Compounds wherein the six-membered hetero ring is a cyclo in a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 11]    11Piperidine containing:
 This subclass is indented under subclass 2.  Compounds which contain a piperidine ring, i.e., a six-membered hetero ring consisting of one ring nitrogen and five ring carbons with no double bonds between ring members.
  
[List of Patents for class 546 subclass 12]    12Azide or acyclic nitrogen containing:
 This subclass is indented under subclass 2.  Compounds which contain an acyclic nitrogen atom or an azide group.
(1) Note. The azide has been considered to be cyclic, , as well as acyclic,

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(2) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 13]    13Boron containing:
 This subclass is indented under subclass 1.  Compounds which contain boron.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 14]    14Silicon containing:
 This subclass is indented under subclass 1.  Compounds which contain silicon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 15]    15Spiro:
 This subclass is indented under subclass 1.  Compounds which contain a spiro ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 16]    16The spiro includes the six-membered hetero ring:
 This subclass is indented under subclass 15.  Compounds wherein at least one of the rings in the spiro ring system is the six-membered hetero ring which consists of one ring nitrogen and five ring carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 17]    17Polycyclo ring system having one of the two rings which form the spiro as one of the cyclos:
 This subclass is indented under subclass 16.  Compounds wherein one of the two rings which form the spiro ring system is additionally one of the cyclos of a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 18]    18Polycyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 17.  Compounds wherein the six-membered hetero ring is one of the cyclos of the polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 19]    19At Least three ring hetero atoms in the two rings which form the spiro:
 This subclass is indented under subclass 16.  Compounds wherein the spiro ring system contains at least two ring hetero atoms in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 20]    20At least three ring nitrogens in the two rings which form the spiro:
 This subclass is indented under subclass 19.  Compounds wherein the spiro ring system includes at least two ring nitrogen atoms in addition to the one ring nitrogen of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 21]    21Phosphorus attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein phosphorus is attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 22]    22Phosphorus attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein phosphorus is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 23]    23Polycyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 22.  Compounds wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.
(1) Note. Compounds in which phosphorus is attached directly by nonionic bonding to any ring of the polycyclo ring system other than the six-membered hetero ring are provided for herein as the attachment of the phosphorus to the six-membered hetero ring is considered to be indirect.
(2) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 24]    24Chalcogen bonded directly to ring carbon fo the six-membered hetero ring:
 This subclass is indented under subclass 22.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 25]    25The phosphorus is bonded directly to the chalcogen:
 This subclass is indented under subclass 24.  Compounds in which the phosphorus is bonded directly to the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 26]    26Polycyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 1.  Compounds wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 27]    27The polycyclo ring system has at least ten cyclos and at least four ring nitrogens:
 This subclass is indented under subclass 26.  Compounds wherein the polycyclo ring system contains at least ten cyclos and at least four ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 28]    28Nonacyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly nine rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 29]    29The six-membered hetero ring shares ring nitrogen with a five-membered cyclo which contains additional ring nitrogen:
 This subclass is indented under subclass 28.  Compounds wherein the nitrogen atom of the six-membered hetero ring is also a member of a five-membered cyclo which contains additional ring nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 30]    30Octacyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly eight rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 31]    31Plural ring hetero atoms in the octacyclo ring system (e.g., flavanthrone, cepharanthrine, etc.):
 This subclass is indented under subclass 30.  Compounds wherein the octacyclo ring system includes at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 32]    32At least four ring nitrogens in the octacyclo ring system (e.g., naphthoylene dibenzimidazole, etc.):
 This subclass is indented under subclass 31.  Compounds wherein the octacyclo ring system contains at least four ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 33]    33Heptacyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly seven rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 34]    34Two of the cyclos share at least three ring members (e.g., protoveratrine, etc.):
 This subclass is indented under subclass 33.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the heptacyclo ring system (i.e., bridged).
(1) Note. An example of a compound included herein is:

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[List of Patents for class 546 subclass 35]    35At least three ring hetero atoms in the heptacyclo ring system:
 This subclass is indented under subclass 34.  Compounds wherein the heptacyclo ring system includes at least two ring hetero atoms in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 36]    36Plural ring hetero atoms in the heptacyclo ring system:
 This subclass is indented under subclass 33.  Compounds wherein the heptacyclo ring system includes at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 37]    37Ring carbon is shared by three of the cyclos (e.g., perylene tetracarboxylic acid diimide, etc.):
 This subclass is indented under subclass 36.  Compounds wherein one ring carbon is a member of three of the cyclos in the heptacyclo ring system (i.e., peri-fusion).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 38]    38Hexacyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly six rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 39]    39Two of the cyclos share at least three ring members (e.g., etheno morphides, etc.):
 This subclass is indented under subclass 38.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the hexacyclo ring system (i.e., bridged).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 40]    40Plural ring nitrogens in the hexacyclo ring system (e.g., reserpic acid lactone, etc.):
 This subclass is indented under subclass 39.  Compounds wherein the hexacyclo ring system includes at least two ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 41]    41Plural ring hetero atoms in the hexacyclo ring system:
 This subclass is indented under subclass 38.  Compounds wherein the hexacyclo ring system contains at least one ring hetero atom in addition to the ring nitrogen in the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 42]    42Pentacyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly five rings.
  
[List of Patents for class 546 subclass 43]    43Two of the cyclos share at least three ring members (i.e., bridged):
 This subclass is indented under subclass 42.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the pentacyclo ring system (i.e., bridged).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 44]    44One of the five cyclos is five-membered and includes ring chalcogen (e.g., codeine, morphine, etc.):
 This subclass is indented under subclass 43.  Compounds wherein one of the cyclos of the pentacyclo ring system is a five-membered hetero ring which contains ring chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 45]    45Nitrogen or divalent chalcogen double bonded directly to carbocyclic ring of the pentacyclo ring system (e.g., morphinones, etc):
 This subclass is indented under subclass 44.  Compounds wherein a nitrogen atom or a divalent chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly by a double bond to a carbocyclic ring of the pentacyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 46]    46A Single chalcogen is bonded directly to ring carbon of the pentacyclo ring system (e.g., desoxy morphine, etc):
 This subclass is indented under subclass 44.  Compounds wherein exactly one chalcogen atom (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the pentacyclo ring system.
(1) Note. This subclass provides for those compounds which contain only one chalcogen bonded directly to a ring carbon of the pentacyclo ring system, e.g., the desoxy morphines, etc.
(2) Note. An example of such a compound is:

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[List of Patents for class 546 subclass 47]    47Plural ring hetero atoms in the pentacyclo ring system:
 This subclass is indented under subclass 42.  Compounds wherein the pentacyclo ring system contains at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 48]    48Three or more ring hetero atoms in the pentacyclo ring system:
 This subclass is indented under subclass 47.  Compounds wherein the pentacyclo ring system contains at least two ring hetero atoms in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 49]    49Two ring nitrogens in the pentacyclo ring system (e.g., quinacridones, etc.):
 This subclass is indented under subclass 47.  Compounds wherein the pentacyclo ring system contains exactly two ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 50]    50Ring nitrogen is shared by two of the cyclos (e.g., yohimbanes, etc.):
 This subclass is indented under subclass 49.  Compounds wherein a ring nitrogen is a member of two of the cyclos in the pentacyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 51]    51Ring nitrogen is shared by five-membered cyclo and six-membered cyclo (e.g., vincamine, etc.):
 This subclass is indented under subclass 50.  Compounds wherein the ring nitrogen of the six membered hetero ring is additionally a member of a five-membered cyclo in the pentacyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 52]    52Additional ring nitrogen in the five-membered cyclo:
 This subclass is indented under subclass 51.  Compounds in which the five-membered ring contains additional ring nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 53]    53Having -C(=X)-; wherein x is chalcogen, bonded directly to ring carbon of the pentacyclo ring system and also bonded directly to chalcogen or nitrogen:
 This subclass is indented under subclass 50.  Compounds in which a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly both to a ring carbon of the pentacyclo ring system and to a chalcogen or nitrogen atom.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 54]    54Plural chalcogens bonded directly to the same cyclo as is the -C(=X)- group:
 This subclass is indented under subclass 53.  Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the same cyclo as is the group.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 55]    55Trialkoxybenzoyl bonded directly to at least one of the chalcogens (e.g., reserpine, etc.):
 This subclass is indented under subclass 54.  Compounds in which bonded directly to at least one of the chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) is a trialkoxybenzoyl group, i.e.,
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 56]    56Three or more ring carbons of the pentacyclo ring system are substituted (e.g., substituted quinacridones, etc.):
 This subclass is indented under subclass 49.  Compounds which contain substituents (other than hydrogen) on at least three of the ring carbons of the pentacyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 57]    57Three or more chalcogens containing:
 This subclass is indented under subclass 56.  Compounds which contain at least three chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 58]    58The pentacyclo ring system consists of five six-membered cyclos (e.g., anthraquinone-benzacridones, etc):
 This subclass is indented under subclass 42.  Compounds wherein the pentacyclo ring system consists of five six-membered cyclos.
  
[List of Patents for class 546 subclass 59]    59Nitrogen attached directly to the pentacyclo ring system by nonionic bonding:
 This subclass is indented under subclass 58.  Compounds wherein nitrogen is attached directly to the pentacyclo ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 60]    60An additional ring is bonded directly to the nitrogen:
 This subclass is indented under subclass 59.  Compounds in which an additional ring is bonded directly to the nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 61]    61Tetracyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the poly-cyclo ring system consists of exactly four rings.
  
[List of Patents for class 546 subclass 62]    62Plural ring hetero atoms in the tetracyclo ring system (e.g., acronycines, etc.):
 This subclass is indented under subclass 61.  Compounds wherein the tetracyclo ring system contains at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 63]    63Two of the cyclos share at least three ring members (i.e., bridged):
 This subclass is indented under subclass 62.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the tetracyclo ring system (i.e., bridged).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 64]    64Three or more ring hetero atoms in the tetracyclo ring system:
 This subclass is indented under subclass 62.  Compounds wherein the tetracyclo ring system contains at least two ring hetero atoms in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 65]    65Plural ring chalcogens in the tetracyclo ring system:
 This subclass is indented under subclass 64.  Compounds wherein the tetracyclo ring system contains at least two ring chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 66]    66Ring carbon is shared by three of the cyclos:
 This subclass is indented under subclass 62.  Compounds wherein one ring carbon is a member of three of the cyclos in the tetracyclo ring system (i.e., peri-fusion).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 67]    67The three cyclos consist of two carbocyclic rings and a five-membered hetero ring which includes a ring nitrogen (e.g., ergolines, etc.):
 This subclass is indented under subclass 66.  Compounds wherein the three cyclos which share the ring carbon consist of two carbocyclic rings and one five-membered hetero ring which contains a ring nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 68]    68Chalcogen or nitrogen bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 67.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 69]    69Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring (e.g., lysergic acid, etc.):
 This subclass is indented under subclass 67.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 70]    70Two ring nitrogens in the tetracyclo ring system:
 This subclass is indented under subclass 62.  Compounds in which the tetracyclo ring system contains exactly two ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 71]    71Ring nitrogen is shared by two of the cyclos:
 This subclass is indented under subclass 61.  Compounds wherein the ring nitrogen of the six-membered hetero ring is a member of an additional cyclo in the tetracyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 72]    72Two of the cyclos share at least three ring members or a ring carbon is shared by three of the cyclos (i.e., bridged or peri-fused):
 This subclass is indented under subclass 71.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo or a ring carbon is a member of three of the cyclos in the tetracyclo ring system (i.e., bridged or peri-fused).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 73]    73The six-membered hetero ring shares ring members with one other cyclo only (e.g., pyrrocolines, etc.):
 This subclass is indented under subclass 71.  Compounds wherein ring members of the six-membered hetero ring are ring members of one additional cyclo only in the tetracyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 74]    74Two of the cyclos share at least three ring members (e.g., morphinans, etc.):
 This subclass is indented under subclass 61.  Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the tetracyclo ring system (i.e., bridged).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 75]    75Ring carbon is shared by three of the cyclos:
 This subclass is indented under subclass 61.  Compounds wherein one ring carbon is a member of three of the cyclos in the tetracyclo ring system (i.e., peri-fusion).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 76]    76Chalcogen bonded directly to ring carbon of the six-membered hetero ring (e.g., anthrapyridones, etc.):
 This subclass is indented under subclass 75.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 77]    77The six-membered hetero ring shares ring members with one other cyclo only:
 This subclass is indented under subclass 61.  Compounds wherein ring members of the six-membered hetero ring are ring members of one additional cyclo only in the tetracyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 78]    78Plural chalcogens bonded directly to carbocyclic rings of the tetracyclo ring system (e.g., pyridoanthraquinones, etc.):
 This subclass is indented under subclass 77.  Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to carbocyclic rings of the tetracyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 79]    79Tricyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly three rings.
  
[List of Patents for class 546 subclass 80]    80Plural ring hetero atoms in the tricyclo ring system:
 This subclass is indented under subclass 79.  Compounds wherein the tricyclo ring system contains at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 81]    81Plural ring nitrogens in the tricyclo ring system:
 This subclass is indented under subclass 80.  Compounds wherein the tricyclo ring system contains at least two ring nitrogens.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 82]    82Three or more ring hetero atoms in the tricyclo ring system:
 This subclass is indented under subclass 81.  Compounds wherein the tricyclo ring system contains at least one additional ring hetero atom.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 83]    83At least one of the ring hetero atoms is chalcogen:
 This subclass is indented under subclass 92.  Compounds wherein at least one of the additional ring hetero atoms is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 84]    84One of the cyclos is five-membered:
 This subclass is indented under subclass 81.  Compounds wherein one of the cyclos of the tricyclo ring system to five-membered.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 85]    85The six-membered hetero ring shares ring members with the five-membered cyclo only (e.g., pyrido-indoles, etc.):
 This subclass is indented under subclass 84.  Compounds in which the six-membered hetero ring has ring members in common with the five-membered ring only in the tricyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 86]    86Chalcogen bonded directly to ring carbon of the tricyclo ring system:
 This subclass is indented under subclass 85.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to ring carbon of the tricyclo ring system.
(1) Note. An example of a compound provied for herein is:

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[List of Patents for class 546 subclass 87]    87Nitrogen attached directly or indirectly to the tricyclo ring system by nonionic bonding:
 This subclass is indented under subclass 85.  Compounds in which nitrogen is attached directly or indirectly to the tricyclo ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 88]    88Phenanthrolines (including hydrogenated):
 This subclass is indented under subclass 81.  Compounds wherein the tricyclo ring system consists of three six-membered rings forming the phenanthrene configuration in which two ring carbons have been replaced by ring nitrogens; said ring system may contain double bonds between ring members.
(1) Note. The phenanthroline ring system can be represented by any one of the following basic structures:

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(2) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 89]    89Ring oxygen in the tricyclo ring system:
 This subclass is indented under subclass 80.  Compounds in which the tricyclo ring system contains ring oxygen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 90]    90Plural ring oxygens in the tricyclo ring system:
 This subclass is indented under subclass 89.  Compounds in which the tricyclo ring system contains at least two ring oxygens.
(1) Note. An example of a compound provided for here is:

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[List of Patents for class 546 subclass 91]    91Tropane and oxirane in the tricyclo ring system:
 This subclass is indented under subclass 89.  Compounds wherein the tricyclo ring system consists of the tropane and oxirane nuclei.

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 92]    92Plural chalcogens bonded directly to ring carbons of the tricyclo ring system:
 This subclass is indented under subclass 89.  Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to ring carbons of the tricyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 93]    93One of the cyclos has at least seven members:
 This subclass is indented under subclass 79.  Compounds wherein one of the cyclos of the tricyclo ring system has at least seven members.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 94]    94Ring nitrogen is shared by two of the cyclos:
 This subclass is indented under subclass 79.  Compounds wherein the ring nitrogen is a member of two of the cyclos in the tricyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 95]    95Benzo (a) quinolizines (including hydrogenated):
 This subclass is indented under subclass 94.  Compounds wherein the tricyclo ring system has the following basic structure, which may contain double bonds between ring members:

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[List of Patents for class 546 subclass 96]    96Additional polycyclo ring system having ring nitrogen (e.g., emetine, etc.):
 This subclass is indented under subclass 95.  Compounds which contain an additional polycyclo ring system having ring nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 97]    97Two of the cyclos share at least three ring carbons (e.g., benzomorphans, etc.):
 This subclass is indented under subclass 79.  Compounds wherein at least three ring carbons of one cyclo are ring carbons of an additional cyclo in the tricyclo ring system (i.e., bridged).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 98]    98Ring carbon is shared by each of the three cyclos (e.g., 1,8-naphthalimides, etc.):
 This subclass is indented under subclass 79.  Compounds wherein a ring carbon is a member of each of the cyclos of the tricyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 99]    99Nitrogen, other than as nitro or nitroso, attached directly or indirectly to the tricyclo ring system by nonionic bonding:
 This subclass is indented under subclass 98.  Compojnds wherein nitrogen, except as a member of the nitro (-NO2) or nitro-so (-NO) group, is attached directly or indirectly to the tricyclo ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 100]    100The Nitrogen is bonded directly to a carbocyclic ring of the tricyclo ring system:
 This subclass is indented under subclass 99.  Compounds in which the nitrogen is bonded directly to a carbocyclic ring of the tricyclo ring system.
  
[List of Patents for class 546 subclass 101]    101Each of the three cyclos is six-membered (e.g., benzoquinolines, etc.):
 This subclass is indented under subclass 79.  Compounds wherein the tricyclo ring system consists of three six-membered rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 102]    102Acridines (including hydrogenated):
 This subclass is indented under subclass 101.  Compounds wherein the tricyclo ring system has the following basic structure, which may contain double bonds between ring members:

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[List of Patents for class 546 subclass 103]    103Chalcogen bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 102.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to ring carbon of the six-membered hetero ring.
  
[List of Patents for class 546 subclass 104]    104Nitrogen, other than as nitro or nitroso, attached directly or indirectly to the acridine ring system by nonionic bonding:
 This subclass is indented under subclass 102.  Compounds in which nitrogen, except as a member of the nitro (-NO2) or nitroso (-NO) group, is attached directly or indirectly to the acridine ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 105]    105The nitrogent is bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 104.  Compounds in which the nitrogen is bonded directly to ring carbon of the six-membered hetero ring.
  
[List of Patents for class 546 subclass 106]    106The nitrogen is part of a substituent which contains additional nonionically bonded nitrogen:
 This subclass is indented under subclass 105.  Compounds wherein the nitrogen is a member of a group containing additional nitrogen which is attached by nonionic bonding to the acridine ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 107]    107Plural nitrogens, other than as nitro or nitroso, attached directly to the carbocyclic rings of the acridine ring system (e.g., 3, 6-diaminoacridines, etc.):
 This subclass is indented under subclass 104.  Compounds wherein at least two nitrogens, except as members of the nitro (-NO) or nitroso (-NO) group, are attached directly to the carbocyclic rings of the acridine ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 108]    108Phenanthridines (including hydrogenated):
 This subclass is indented under subclass 101.  Compounds wherein the tricyclo ring system has the following basic structure, which may contain double bonds between ring members:

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[List of Patents for class 546 subclass 109]    109Unsaturated ring bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 108.  Compounds in which an unsaturated ring, i.e., a ring which contains at least one double bond between ring members, is bonded directly to ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 110]    110Chalcogen or -C(=X)-, wherein X is chalcogen, attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 101.  Compounds in which chalcogen (i.e., oxygen, sulfur,selenium or tellurium), or a -C- group, in which X is chalcogen, is bonded directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 111]    111The tricyclo ring system consists of a five-membered carbocyclic ring ortho fused to both a six-membered carboxyclic ring and the six-membered hetero ring (e.g., indenopyridines, etc.):
 This subclass is indented under subclass 79.  Compounds in which the tricyclo ring system consists of a five-membered carbocyclic ring ortho fused to both a six-membered carbocyclic ring and the six-membered hetero ring; e .g.,

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 112]    112Bicyclo ring system having the six-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 26.  Compounds in which the polycyclo ring system consists of exactly two rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 113]    113Plural ring hetero atoms in the bicyclo ring system:
 This subclass is indented under subclass 112.  Compounds wherein the bicyclo ring system includes at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 114]    114Ring sulfur in the bicyclo ring system:
 This subclass is indented under subclass 113.  Compounds in which the bicyclo ring system contains ring sulfur.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 115]    115Ring oxygen in the bicyclo ring system:
 This subclass is indented under subclass 113.  Compounds in which the bicyclo ring system contains ring oxygen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 116]    116Acyclic chalcogen bonded directly to ring carbon of the bicyclo ring system:
 This subclass is indented under subclass 115.  Compounds in which acyclic chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to ring carbon of the bicyclo ring system.
(1) Note. Lactones of pyridine carboxylic acids are provided for in this subclass, e.g.:

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[List of Patents for class 546 subclass 117]    117At least four ring nitrogens in the bicyclo ring system:
 This subclass is indented under subclass 113.  Compounds wherein the bicyclo ring system contains at least four ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 118]    118Three ring nitrogens in the bicyclo ring system:
 This subclass is indented under subclass 113.  Compounds wherein the bicyclo ring system contains exactly three ring nitrogens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 119]    119Two of the ring nitrogens are bonded directly to each other:
 This subclass is indented under subclass 118.  Compounds wherein two of the ring nitrogens are bonded directly to each other.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 120]    120Having -C(=X)-, wherein X is chalcogen, bonded directly to the bicyclo ring system:
 This subclass is indented under subclass 119.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 121]    121Ring nitrogen is shared by the two cyclos:
 This subclass is indented under subclass 113.  Compounds wherein the ring nitrogen is a member of both cyclos of the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 122]    122The other cyclo in the bicyclo ring system is also six-membered (e.g., naphthyridines, etc.):
 This subclass is indented under subclass 113.  Compounds wherein the bicyclo ring system consists of two six-membered cyclos.
  
[List of Patents for class 546 subclass 123]    123Chalcogen and -C(=X)-, wherein X is chalcogen bonded directly to ring carbons of the bicyclo ring system (e.g., 4-oxo-naphthyridine-3-carboxylic acid, etc.):
 This subclass is indented under subclass 122.  Compounds in which both chalocogen (i.e., oxygen, sulfur, selenium, or tellurium) and a group, wherein X is chalcogen, are bonded directly to ring carbons of the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 124]    124Tropanes (including nor and dehydro forms):
 This subclass is indented under subclass 112.  Compounds in which the bicyclo ring system has the following basic structure:

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(1) Note. Included here also are the nor- (absence of methyl group on ring nitrogen) and dehydro- (presence of double bonds between ring members) forms of tropane.
(2) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 125]    125Additional hetero ring containing:
 This subclass is indented under subclass 124.  Compounds which contain an additional hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 126]    126Additional polycyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 125.  Compounds wherein the additional hetero ring is one of the cyclos in a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 127]    127Chalcogen bonded directly to ring carbon of the tropane ring system:
 This subclass is indented under subclass 124.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the tropane ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 128]    128Polycyclo-carbocyclic ring system:
 This subclass is indented under subclass 127.  Compounds having a carbocyclic ring system which contains at least two rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 129]    129Additional chalcogen attached directly or indirectly to the tropane ring system by nonionic bonding:
 This subclass is indented under subclass 127.  Compounds wherein additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly or indirectly to the tropane ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 130]    130Three or more oxygens attached directly or indirectly to the tropane ring system by nonionic bonding:
 This subclass is indented under subclass 129.  Compounds in which at least three oxygens are attached directly or indirectly to the tropane ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 131]    131Hydroxy containing or containing oxy bonded directly to a group IA or group IIA light metal (i.e., -OH or -OM containing):
 This subclass is indented under subclass 130.  Compounds which contain either an -OH or an -OM group, wherein M is a Group IA or Group IIA metal having specific gravity less than four.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 132]    132Having -C(=X), wherein X is chalcogen, bonded directly to the tropane ring system:
 This subclass is indented under subclass 124.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the tropane ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 133]    133Quinuclidines (including unsaturated):
 This subclass is indented under subclass 112.  Compounds wherein the bicyclo ring system has the following basic structure, which may contain double bonds between ring members:

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 134]    134Quinoline containing (including hydrogenated):
 This subclass is indented under subclass 133.  Compounds containing the quinoline ring system, which may contain double bonds between ring members, i.e.,

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 135]    135Additional hetero ring containing:
 This subclass is indented under subclass 134.  Compounds which contain an additional hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 136]    136Three or more chalcogens attached indirectly to the quinuclidine ring system by nonionic bonding:
 This subclass is indented under subclass 134.  Compounds in which at least three chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are attached indirectly to the quinuclidine ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 137]    137Chalcogen bonded directly to ring carbon of the quinuclidine ring system:
 This subclass is indented under subclass 133.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the quinuclidine ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 138]    138Quinolizines (including hydrogenated):
 This subclass is indented under subclass 112.  Compounds wherein the bicyclo ring system has the following basic structure, which may contain double bonds between ring members:

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 139]    139Isoquinolines (including hydrogenated):
 This subclass is indented under subclass 112.  Compounds wherein the bicyclo ring system has the following structure, which may contain double bonds between ring members:

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[List of Patents for class 546 subclass 140]    140Plural isoquinoline ring systems attached directly or indirectly to each other by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds which contain at least two isoquinoline ring systems that are attached directly or indirectly to each other by nonionic bonding.
(1) Note. Example of compounds provided for herein are:

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[List of Patents for class 546 subclass 141]    141Chalcogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the six-membered hetero ring of the isoquinoline ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 142]    142Plural chalcogens attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 141.  Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are attached directly to the six-membered hetero ring of the isoquinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 143]    143Nitrogen, other than as nitro or nitroso, attached directly to the isoquinoline ring system by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein nitrogen, except as a member of the nitro (-NO2) or nitroso (-NO) group, is attached directly to the isoquinoline ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 144]    144Unsaturated ring attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein an unsaturated ring, i.e., a ring having at least one double bond between ring members, is attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. The term "unsaturated ring" as used herein does not refer to the six-membered carbocyclic ring of the isoquinoline ring system but rather to an additional unsaturated ring which is attached directly to the six-membered ring.
(2) Note. Examples of compounds provided for herein mare:

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[List of Patents for class 546 subclass 145]    145Acyclic nitrogen double or triple bonded to carbon which is attached directly or indirectly to the isoquinoline ring system by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein acyclic nitrogen is attached by a double or triple bond to carbon which in turn is attached directly or indirectly to the isoquinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 146]    146Having -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the isoquinoline ring system by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly or indirectly to the isoquinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 147]    147The -C(=X)- is Part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 146.  Compounds in which the -C(=X)- is part of a group, wherein the X"s are the same, or diverse, chalcogens (i.e., oxygen, sulfur, selenium, or tellurium.)
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 148]    148Unsaturated hetero ring attached indirectly to the isoquinoline ring system by nonionic bonding:
 This subclass is indented under subclass 139.  Compounds wherein an unsaturated hetero ring, i.e., a hetero ring having at least one double bond between ring members, is attached indirectly to the isoquinoline ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 149]    149Unsaturated carbocyclic ring attached indirectly to the six-membered hetero ring through an acyclic hydrocarbon chain:
 This subclass is indented under subclass 139.  Compounds wherein an unsaturated carbocyclic ring, i.e., a ring consisting of carbon atoms and having at least one double bond between ring members, is attached indirectly to the six-membered hetero ring of the isoquinoline ring system through an acyclic hydrocarbon chain, i.e., a chain consisting of carbon and hydrogen atoms.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 150]    150Single bond between 3,4-positions:
 This subclass is indented under subclass 139.  Compounds wherein there is a single bond between the 3,4-positions of the isoquinoline ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 151]    151N-alkyl or n-alkenyl isoquinoliniums which are otherwise unsubstituted or alkyl or alkenyl substituted only:
 This subclass is indented under subclass 139.  Compounds wherein the carbon atoms of the isoquinoline ring system are unsubstituted or contain an alkyl or alkenyl substituent only and in which the nitrogen atom is pentavalent having bonded directly thereto an alkyl or alkenyl group.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 152]    152Quinolines (including hydrogenated):
 This subclass is indented under subclass 112.  Compounds in which the bicyclo ring system has the following basic structure, which may contain double bonds between ring members:

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[List of Patents for class 546 subclass 153]    153Chalcogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the six-membered hetero ring of the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 154]    154Polycyclo-carbocyclic ring system bonded directly to the six-membered hetero ring (e.g., quinophthalones, etc.):
 This subclass is indented under subclass 153.  Compounds in which a polycyclo-carbocyclic ring system is bonded directly to the six-membered hetero ring of the quinoline ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 155]    155Plural chalcogens attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 153.  Compounds in which at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 156]    156Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 153.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the six-membered hetero ring.
  
[List of Patents for class 546 subclass 157]    157Chalcogen attached directly at 2-position by nonionic bonding:
 This subclass is indented under subclass 153.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly at the 2-position of the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 158]    158Single bond between 3,4-positions:
 This subclass is indented under subclass 157.  Compounds in which there is a single bond between positions 3 and 4 of the quinoline ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 159]    159Nitrogen, other than as nitro or nitroso, attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which nitrogen, except as a member of the nitro (-NO2) or nitroso (-NO) group, is attached directly to the six-membered hetero ring of the quinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 160]    160Unsaturated carbocyclic ring bonded directly to the nitrogen:
 This subclass is indented under subclass 159.  Compounds in which an unsaturated carbocyclic ring, i.e., a ring consisting of carbon and having at least one double bond between ring members, is bonded directly to the nitrogen.
  
[List of Patents for class 546 subclass 161]    161Having -C(=X)-, wherein X is chalcogen, bonded directly to the carbocyclic ring:
 This subclass is indented under subclass 160.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the carbocyclic ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 162]    162Nitrogen attached indirectly to the six-membered hetero ring through the directly attached nitrogen by nonionic bonding:
 This subclass is indented under subclass 159.  Compounds wherein nitrogen is attached indirectly to the six-membered hetero ring through the nitrogen which is directly attached by nonionic bonding.
(1) Note. Examples of compounds provided for herein a re:

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[List of Patents for class 546 subclass 163]    163Both nitrogens bonded directly to the same acyclic hydrocarbon group:
 This subclass is indented under subclass 162.  Compounds in which both nitrogen atoms are bonded directly to the same acyclic hydrocarbon group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 164]    164Fully saturated quinolines:
 This subclass is indented under subclass 152.  Compounds wherein the quinoline ring system is fully saturated, i.e., no double bonds between ring members.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 165]    165Single bond between 1,2-positions and single bond between 3,4-positions:
 This subclass is indented under subclass 152.  Compounds in which there are single bonds between positions 1 and 2 and positions 3 and 4 of the quinoline ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 166]    166The six-membered hetero ring is unsubstituted or alkyl substituted only:
 This subclass is indented under subclass 165.  Compounds in which the six-membered hetero ring is unsubstituted or substituted by alkyl groups only.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 167]    167Unsaturated hetero ring attached directly to the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which an unsaturated hetero ring is attached directly to the quinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 168]    168Having -C(=X)-, wherein X is chalcogen, bonded directly to the quinoline ring system:
 Compounds under subclas 152 wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the quinoline ring system.
  
[List of Patents for class 546 subclass 169]    169Acyclic nitrogen bonded directly to the -C(-X)- group:
 This subclass is indented under subclass 168.  Compound in which acyclic nitrogen is bonded directly to the group.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 170]    170The -C(=X)- is part of -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 168.  Compounds wherein the is part of a group, in which the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 171]    171Nitrogen, other than as nitro or nitroso, attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds wherein nitrogen, except as a member of the nitro (-NO2) or nitroso (-NO) group, is attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 172]    172Acyclic sulfur bonded directly to oxygen and directly or indirectly to the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which acyclic sulfur is bonded both directly to oxygen and directly or indirectly to the quinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 173]    173Unsaturated carbocyclic ring attached directly to the quinoline ring system by nonionic bonding (e.g., quinophthalones, etc.):
 This subclass is indented under subclass 152.  Compounds in which an unsaturated carbocyclic ring is attached directly to the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 174]    174Having -C(=X)-, wherein X is chalcogen, attached indirectly to the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached indirectly to the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 175]    175Nitrogen bonded directly to the -C(=X)- group:
 This subclass is indented under subclass 174.  Compounds in which nitrogen is bonded directly to the group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 176]    176Nitrogen, other than as nitro or nitroso, attached indirectly to the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds wherein nitrogen, except as a member of the nitro (-NO2) or nitroso (-NO) group, is attached indirectly to the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 177]    177Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 176.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 178]    178Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 179]    179The chalcogen is in an -OH, -SH, -OM or -SM group (M is group IA or group IIA light metal):
 This subclass is indented under subclass 178.  Compounds in which the chalcogen is part of an -OH, -SH, -OM or -SM group; wherein M is a Group IA or Group IIA metal having a specific gravity less than four.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 180]    180Halogen of nitro attached directly or indirectly to the quinoline ring system by nonionic bonding:
 This subclass is indented under subclass 152.  Compounds in which halogen or a nitro group (-NO2) is attached directly or indirectly to the quinoline ring system by nonionic bonding.
  
[List of Patents for class 546 subclass 181]    181Quinolines which are unsubstituted or which are alkyl or alkenyl substituted only, or salt thereof:
 This subclass is indented under subclass 152.  Compounds wherein the quinoline ring system is either unsubstituted or substituted by alkyl or alkenyl groups only, or salts thereof.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 182]    182Addition salts:
 This subclass is indented under subclass 181.  Compounds which are addition salts of (a) unsubstituted quinoline or (b) quinoline substituted by alkyl or alkenyl radicals only.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 183]    183Chalcogen bonded directly to ring carbon of the bicyclo ring system:
 This subclass is indented under subclass 112.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to ring carbon of the bicyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 184]    184Piperdines:
 This subclass is indented under subclass 1.  Compounds in which the six-membered hetero ring, consisting of one nitrogen and five carbons, contains no double bonds between ring members, i.e., the piperidine ring.
  
[List of Patents for class 546 subclass 185]    185Process of forming a piperidine ring from a pyridine ring or from a partially hydrogenated pyridine ring:
 This subclass is indented under subclass 184.  Processes wherein the piperidine ring is prepared by the hydrogenation of pyridine or partially hydrogenated pyridine.
(1) Note. This subclass includes all hydrogenation processes for the formation of piperidine from pyridine or partially hydrogenated pyridine, whether the hydrogenation reaction is a single step process or merely one step in a multistage reaction process.
  
[List of Patents for class 546 subclass 186]    186Plural piperidine rings:
 This subclass is indented under subclass 184.  Compounds which contain at least two piperidine rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 187]    187Additional hetero ring containing:
 This subclass is indented under subclass 186.  Compounds which contain an additional hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 188]    188Chalcogen attached directly to a ring carbon of a piperidine ring by nonionic bonding:
 This subclass is indented under subclass 186.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to a piperidine ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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261,for tautomers of chalcogen double bonded directly to piperidine (i.e., chalcogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,
  
[List of Patents for class 546 subclass 189]    189Having -C(=X)-, wherein X is chalcogen, bonded directly to a piperidine ring:
 This subclass is indented under subclass 186.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to a piperidine ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 190]    190Having -C(=X)-, wherein X is chalcogen, attached indirectly to a piperidine ring by nonionic bonding:
 This subclass is indented under subclass 186.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached indirectly to a piperidine ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 191]    191Carbocyclic ring containing:
 This subclass is indented under subclass 186.  Compounds which contain a carbocyclic ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 192]    192Additional ring containing:
 This subclass is indented under subclass 184.  Compounds which contain an additional ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 193]    193Pyridine ring or partially hydrogenated pyridine ring:
 This subclass is indented under subclass 192.  Compounds in which the additional ring is a pyridine ring or partially hydrogenated pyridine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 194]    194Carbocyclic ring containing:
 This subclass is indented under subclass 193.  Compounds which additionally contain a carbocyclic ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 195]    195The additional ring is one of the cyclos in a polycyclo ring system:
 This subclass is indented under subclass 192.  Compounds in which the additional ring is one of the cyclos in a polycyclo ring system.
(1) Note. An example of a compound provided for here in is:

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[List of Patents for class 546 subclass 196]    196Hetero ring in the polycyclo ring system:
 This subclass is indented under subclass 195.  Compounds wherein the polycyclo ring system contains a hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 197]    197Plural ring hetero atoms in the polycyclo ring system:
 This subclass is indented under subclass 196.  Compounds in which the polycyclo ring system contains at least two ring hetero atoms.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 198]    198Ring nitrogen in the polycyclo ring system:
 This subclass is indented under subclass 197.  Compounds in which the polycyclo ring system contains a ring nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 199]    199Plural ring nitrogens in the polycyclo ring system:
 This subclass is indented under subclass 198.  Compounds in which the polycyclo ring system contains at least two ring nitrogen atoms.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 200]    200Ring nitrogen in the polycyclo ring system:
 This subclass is indented under subclass 196.  Compounds in which the polycyclo ring system contains a ring nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 201]    201Bicyclo ring system which is indole (including hydrogenated):
 This subclass is indented under subclass 200.  Compounds wherein the polycyclo ring system is bicyclo and consists of the following basic structure in which the bonds between the ring members may be single or double bonds:

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 202]    202Ring sulfur in the polycyclo ring system:
 This subclass is indented under subclass 196.  Compounds in which the polycyclo ring system contains a ring sulfur.
(1) Note. An example of a compound provied for herein is:

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[List of Patents for class 546 subclass 203]    203The polycyclo ring system is tricyclo-carbocyclic:
 This subclass is indented under subclass 195.  Compounds in which the polycyclo ring system consists of three carbocyclic rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 204]    204Chalcogen bonded directly to the tricyclo-carbocyclic ring system:
 This subclass is indented under subclass 203.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the tricyclo-carbocyclic ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 205]    205The polycyclo ring system is bicyclo-carbocyclic:
 This subclass is indented under subclass 195.  Compounds in which the polycyclo ring system consists of two carbocyclic rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 206]    206Chalcogen bonded directly to the bicyclo-carbocyclic ring system:
 This subclass is indented under subclass 205.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the bicyclo-carbocyclic ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 207]    207The additional ring is a hetero ring:
 This subclass is indented under subclass 192.  Compounds in which the additional ring is a hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 208]    208The additional hetero ring has at least nitrogen as a ring hetero atom:
 This subclass is indented under subclass 207.  Compounds in which the additional hetero ring contains ring nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 209]    209Ring sulfur or ring oxygen in the additional hetero ring:
 This subclass is indented under subclass 208.  Compounds in which the additional heteror ring additionally contains ring sulfur or ring oxygen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 210]    210Plural ring nitrogens in the additional hetero ring:
 This subclass is indented under subclass 208.  Compounds in which the additional hetero ring contains at least two ring nitrogens.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 211]    2111,2-diazole (including hydrogenated):
 This subclass is indented under subclass 210.  Compounds wherein the additional hetero ring consists of two ring nitrogens in adjacent positions and three ring carbons; i.e.,

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 212]    212The additional hetero ring consists of one sulfur and four carbons:
 This subclass is indented under subclass 207.  Compounds in which the additional hetero ring consists of one ring sulfur and four ring carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 213]    213Carbocyclic ring containing:
 This subclass is indented under subclass 212.  Compounds which contain a carbocyclic ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 214]    214The additional hetero ring consists of one oxygen and four carbons:
 This subclass is indented under subclass 207.  Compounds in which the additional hetero ring consists of one oxygen and four carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 215]    215Cyano bonded directly to the piperidine ring:
 This subclass is indented under subclass 192.  Compounds in which a -CbN groups is bonded directly to the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 216]    216Chalcogen bonded directly to ring carbon of the piperidine ring:
 This subclass is indented under subclass 192.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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290,for tautomers of chalcogen double bonded directly to piperidine (i.e., chalcogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 217]    217Chalcogen and a carbocyclic ring bonded directly at 4-position:
 This subclass is indented under subclass 216.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) and a carbocyclic ring are bonded directly to the piperidine ring at the 4-position.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 218]    218The chalcogen, X, is part of a -C(=X)X-group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 217.  Compounds in which the chalcogen, X, is part of a group, wherein the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 219]    219Plural chalcogens bonded directly to ring carbons of the piperidine ring:
 This subclass is indented under subclass 216.  Compounds in which at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to ring carbons of the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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296,for tautomers of chalcogen double bonded directly to piperidine (i.e., chalcogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 220]    220Having -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 219.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen sulfur, selenium, or tellurium), is attached directly, or indirectly to the piperidine ring by nonionic bonding.
(1) Note. An example of a compound provided for here is:

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[List of Patents for class 546 subclass 221]    221Having -C(=X), wherein X is chalcogen, attached directly or indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 216.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached directly or indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 222]    222The -C(=X)- group and the piperidine ring are bonded directly to the same chalcogen:
 This subclass is indented under subclass 221.  Compounds wherein the group and the piperidine ring are each bonded directly to the same chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) atom.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 223]    223Nitrogen attached directly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 192.  Compounds in which nitrogen is attached directly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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304+,for tautomers of nitrogen double bonded directly to piperidine (i.e., nitrogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 224]    224Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen:
 This subclass is indented under subclass 223.  Compounds wherein acyclic nitrogen is bonded directly to a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 225]    225Having -C(=X)-, wherein X is chalcogen, bonded directly to the piperidine ring:
 This subclass is indented under subclass 192.  Compounds in which a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the piperdine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 226]    226At 1-position:
 This subclass is indented under subclass 225.  Compounds wherein the group is bonded directly to the piperidine ring at the 1-position, i.e., to the nitrogen atom of the ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 227]    227The -C(=X)- is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 225.  Compounds wherein the is part of a group, in which the X"s are the same, or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 228]    228Carbocyclic ring bonded directly at 4-position:
 This subclass is indented under subclass 227.  Compounds in which a carbocyclic ring is bonded directly to the piperidine ring at the 4-position.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 229]    229Nitrogen attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 192.  Compounds in which nitrogen is attached indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 230]    230Cyano attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 229.  Compounds in which the -C N group is attached indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 231]    231Plural acyclic nitrogens bonded directly to the same carbon or single bonded directly to each other:
 This subclass is indented under subclass 229.  Compounds containing at least two acyclic nitrogen atoms which are bonded directly to the same carbon or single bonded directly to each other.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 232]    232Chalcogen attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 229.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 233]    233Acyclic nitrogen bonded directly to A-C(=X)- group, wherein X is chalcogen:
 This subclass is indented under subclass 232.  Compounds containing an acyclic nitrogen which is bonded directly to a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 234]    234Plural carbocyclic rings containing:
 This subclass is indented under subclass 233.  Compounds which contain at least two carbocyclic rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 235]    235The chalcogen, X, is in a -C(=X)- group:
 This subclass is indented under subclass 232.  Compounds in which the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in a group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 236]    236Chalcogen attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 192.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 237]    237The chalcogen, X, is in a -C(=X)- group:
 This subclass is indented under subclass 236.  Compounds in which the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in a group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 238]    238The -C(=X)- is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 237.  Compounds wherein the is part of a group, in which the X"s are the same, or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 239]    239Plural carbocyclic rings containing:
 This subclass is indented under subclass 238.  Compounds which contain at least two carbocyclic rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 240]    240The chalcogen is in an -OH or -OM group (M is group IA or group IIA light metal):
 This subclass is indented under subclass 236.  Compounds in which the chalcogen is in an -OH or -OM group, wherein M is a Group IA or Group IIA metal having a specific gravity less than four.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 241]    241The -OH or -OM is bonded to an acyclic carbon, which carbon is bonded directly to two rings:
 This subclass is indented under subclass 240.  Compounds where in the -OH or -OM group is bonded to an acyclic carbon atom which is bonded directly to two rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 242]    242Chalcogen bonded directly to ring carbon of the piperidine ring:
 This subclass is indented under subclass 184.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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290,for tautomers of chalcogen double bonded directly to piperidine (i.e., chalcogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 243]    243At 2-position:
 This subclass is indented under subclass 242.  Compounds in which the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded to the 2-position of the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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290,for tautomers of chalcogen double bonded directly to piperidine (i.e., chalcogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 244]    244Nitrogen attached directly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 184.  Compounds wherein nitrogen is attached directly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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304+,for tautomers of nitrogen double bonded directly to piperidine (i.e., nitrogen attached directly to pyridine or partially hydrogenated pyridine), e.g.,

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[List of Patents for class 546 subclass 245]    245Having -C(=X)-, wherein X is chalcogen:
 This subclass is indented under subclass 184.  Compounds which contain a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium, bonded directly to the piperidine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 246]    246Nitrogen attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 184.  Compounds in which nitrogen is attached indirectly to the piperidine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 247]    247Acyclic nitrogen bonded directly to A-C(=X)- group, wherein X is chalcogen:
 This subclass is indented under subclass 246.  Compounds containing an acyclic nitrogen which is bonded directly to a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 248]    248Chalcogen attached indirectly to the piperidine ring by nonionic bonding:
 This subclass is indented under subclass 184.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the piperidine ring by nonionic bonding.

Aliphatic

Aliphatic

(1) Note. A compound of the type would be provided for herein rather than above in subclasses 242+ as the chalcogen which is bonded directly to the six-membered hetero ring is attached to the ring nitrogen rather than a ring carbon. Placement is based on the oxygen which is attached indirectly, i.e., through a sulfur atom, to the six-membered hetero ring.
(2) Note. Additional examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 249]    249Process of forming partially hydrogenated pyridine ring:
 This subclass is indented under subclass 1.  Compounds whereby a partially hydrogenated pyridine ring is formed, i.e., a six-membered hetero ring consisting of one nitrogen and five carbons having one or two double bonds between the ring members.
(1) Note. Included herein are processes of forming the partially hydrogenated pyridine ring by any means, e.g., ring closure, ring expansion, dehydrogenation, hydrogenation, etc.
  
[List of Patents for class 546 subclass 250]    250Process of forming pyridine ring:
 This subclass is indented under subclass 1.  Processes of forming the pyridine ring, i.e., six-membered hetero ring consisting of one nitrogen and five carbons having three double bonds between the ring members.
(1) Note. Included here are processes of forming the pyridine ring by any means, e.g., ring closure, ring expansion, dehydrogenation, etc.
  
[List of Patents for class 546 subclass 251]    251The pyridine ring is unsubstituted or hydrocarbyl substituted only:
 This subclass is indented under subclass 250.  Processes wherein the pyridine ring which is formed is either unsubstituted or substituted by hydrocarbon groups only.
(1) Note. Hydrocarbon groups consist of carbon and hydrogen only. A substituent containing any other atom would not be provided for herein.
  
[List of Patents for class 546 subclass 252]    252Starting materials include a hetero ring having at least nitrogen as a ring hetero atom (e.g., starting materials include a piperidine ring, etc.):
 This subclass is indented under subclass 251.  Processes wherein the starting materials include a compound having a hetero ring which contains a ring nitrogen.
  
[List of Patents for class 546 subclass 253]    253Starting materials include a hydrocarbon:
 This subclass is indented under subclass 251.  Processes which utilize hydrocarbons as starting materials.
  
[List of Patents for class 546 subclass 254]    254Starting Materials Include an Acyclic Hydrocarbyl Ether or an Acyclic Hydrocarbyl Alcohol:
 This subclass is indented under subclass 251.  Processes which utilize an acyclic hydrocarbyl ether or an acyclic hydrocarbyl alcohol as a starting material.
  
[List of Patents for class 546 subclass 255]    255Plural pyridine or partially hydrogenated pyridine rings:
 This subclass is indented under subclass 1.  Compounds which contain at least two of the six-membered hetero rings, each consisting of one nitrogen and five carbons and having at least one double bond between ring members, i.e., pyridine or partially hydrogenated pyridine rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 256]    256Additional hetero ring containing:
 This subclass is indented under subclass 255.  Compounds which contain an additional hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 257]    257Pyridine or partially hydrogenated pyridine rings are bonded directly to each other:
 This subclass is indented under subclass 255.  Compounds wherein the pyridine or partially hydrogenated pyridine rings are bonded directly to each other.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 258]    258Halogen containing or process utilizing halogen or halogen containing compound:
 This subclass is indented under subclass 257.  compounds which contain halogen or processes which utilize halogen or a halogen containing compound in the formation, purification, or recovery of a compound wherein the plural pyridine or partially hydrogenated pyridine rings are bonded directly to each other.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 259]    259Metal containing catalyst utilized:
 This subclass is indented under subclass 258.  Processes utilizing a metal or metal containing compound as catalyst.
  
[List of Patents for class 546 subclass 260]    260Metal containing catalyst utilized:
 This subclass is indented under subclass 257.  Processes utilizing a metal or metal containing compound as catalyst.
  
[List of Patents for class 546 subclass 261]    261Chalcogen bonded directly to ring carbon of pyridine or partially hydrogenated pyridine ring:
 This subclass is indented under subclass 255.  Compounds containing chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is bonded directly to a ring carbon of a pyridine or partially hydrogenated pyridine ring.
(1) Note. Examples of compounds provided for herein are:

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188,for tautomers of chalcogen attached directly to pyridine or partially hydrogenated pyridine (i.e., chalcogen double bonded directly to piperidine), e.g.,

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[List of Patents for class 546 subclass 262]    262Having -C(=X)-, wherein X is chalcogen, bonded directly to pyridine or partially hydrogenated pyridine ring:
 This subclass is indented under subclass 255.  Compounds in which a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), bonded directly to pyridine or partially hydrogenated pyridine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 263]    263The -C(=X)- is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 262.  Compounds wherein the is part of a group, in which the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 264]    264Acyclic nitrogen attached directly or indirectly to pyridine or partially hydrogenated pyridine ring by nonionic bonding:
 This subclass is indented under subclass 255.  Compounds in which acyclic nitrogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 265]    265Having -C(=X)-, wherein X is chalcogen, bonded directly to the acyclic nitrogen:
 This subclass is indented under subclass 264.  Compounds in which the acyclic nitrogen is bonded directly to a group, wherei X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 266]    266Chalcogen attached indirectly to pyridine or partially hydrogenated pyridine ring by nonionic bonding:
 This subclass is indented under subclass 255.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to a pyridine or partially hydrogenated pyridine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 267]    267The chalcogen, X, is in a -C(=X)-group:
 This subclass is indented under subclass 266.  Compounds wherein the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in a group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 268.1]    268.1Additional hetero ring containing:
 This subclass is indented under subclass 1.  Compounds which contain an additional hetero ring.
  
[List of Patents for class 546 subclass 268.4]    268.4The additional hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen:
 This subclass is indented under subclass 268.1.  Compounds wherein the additional hetero ring is five-membered and has two or more ring hetero atoms of which at least one is nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 268.7]    268.7Thiadiazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring consists of two ring nitrogens, one ring sulfur, and two ring carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 269.1]    269.1Oxadiazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring consists of two ring nitrogens, one ring oxygen, and two ring carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 269.4]    269.4Oxadiazole ring bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 269.1.  Compounds wherein the six-membered hetero ring is bonded directly to the oxadiazole ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 269.7]    269.71,3-thiazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has sulfur in the 1-position, nitrogen in the 3-position, and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 270.1]    270.1Polycyclo ring system having the 1,3-thiazole ring as one of the cyclos:
 This subclass is indented under subclass 269.7.  Compounds wherein the 1,3-thiazole ring is one of the cyclos of a polycyclo ring system.
(1) Note An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 270.4]    270.41,3-thiazole ring bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 269.7.  Compounds wherein the six-membered hetero ring is bonded directly to the 1,3-thiazole ring.
  
[List of Patents for class 546 subclass 270.7]    270.7Nitrogen attached directly to the 1,3-thiazole ring by nonionic bonding:
 This subclass is indented under subclass 269.7.  Compounds wherein the 1,3-thiazole ring is attached directly to nitrogen by nonionic bonding.
  
[List of Patents for class 546 subclass 271.1]    271.11,2-thiazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has sulfur in the 1-position, nitrogen in the 2-position, and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 271.4]    271.41,3-oxazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has oxygen in the 1-position, nitrogen in the 3-position, and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 271.7]    271.7Polycyclo ring system having the 1,3-oxazole ring as one of the cyclos:
 This subclass is indented under subclass 271.4.  Compounds wherein the 1,3-oxazole ring is one of the cyclos of a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 272.1]    272.11,2-oxazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has oxygen in the 1-position, nitrogen in the 2-position, and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 272.4]    272.41,2,4-triazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has nitrogens in the 1,2 and 4-positions and carbons in the remaining two positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 272.7]    272.71,3-diazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has nitrogens in the 1- and 3-positions and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 273.1]    273.1Polycyclo ring system having the 1,3-diazole ring as one of the cyclos:
 This subclass is indented under subclass 272.7.  Compounds wherein the 1,3-diazole ring is one of the cyclos of a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 273.4]    273.4Bicyclo ring system which is benzimidazole (including hydrogenated):
 This subclass is indented under subclass 273.1.  Compounds wherein the polycyclo ring system is bicyclo and consists of the following basic structure in which the bonds between the ring members may be single or double bonds:

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[List of Patents for class 546 subclass 273.7]    273.7Chalcogen bonded directly to a ring carbon of the 1,3-diazole ring:
 This subclass is indented under subclass 273.4.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the 1,3-diazole ring.
  
[List of Patents for class 546 subclass 274.1]    274.1The 1,3-diazole ring is bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 272.7.  Compounds wherein the six-membered hetero ring is bonded directly to the 1,3-diazole ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 274.4]    274.4Chalcogen attached directly to the 1,3-diazole ring by nonionic bonding:
 This subclass is indented under subclass 272.7.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the 1,3-diazole ring by nonionic bonding.
  
[List of Patents for class 546 subclass 274.7]    274.7Nitrogen or -C(=X)-, wherein X is chalcogen, attached directly to the 1,3-diazole ring by nonionic bonding:
 This subclass is indented under subclass 272.7.  Compounds in which nitrogen or -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), is attached directly to the 1,3-diazole ring by nonionic bonding.
  
[List of Patents for class 546 subclass 275.1]    275.1Chalcogen attached indirectly to the 1,3-diazole ring by acyclic nonionic bonding:
 This subclass is indented under subclass 272.7.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the 1,3-diazole ring by acyclic nonionic bonding.
  
[List of Patents for class 546 subclass 275.4]    275.41,2-diazoles (including hydrogenated):
 This subclass is indented under subclass 268.4.  Compounds in which the five-membered hetero ring has nitrogens in the 1- and 2-positions and carbons in the remaining three positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members:

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[List of Patents for class 546 subclass 275.7]    275.7Polycyclo ring system having the 1,2-diazole ring as one of the cyclos:
 This subclass is indented under subclass 275.4.  Compounds wherein the 1,2-diazole ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 546 subclass 276.1]    276.1Chalcogen attached directly to the 1,2-diazole ring by nonionic bonding:
 This subclass is indented under subclass 275.4.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is attached directly to the 1,2-diazole ring by nonionic bonding.
  
[List of Patents for class 546 subclass 276.4]    276.4The additional hetero ring is five-membered consisting of one nitrogen and four carbons:
 This subclass is indented under subclass 268.1.  Compounds wherein the additional hetero ring is five-membered and consists of one ring nitrogen and four ring carbons.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 276.7]    276.7Polycyclo ring system having the five-membered hetero ring as one of the cyclos:
 This subclass is indented under subclass 276.4.  Compounds wherein the five-membered hetero ring is one of the cyclos of a polycyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 277.1]    277.1Bicyclo ring system which is isoindole (including hydrogenated):
 This subclass is indented under subclass 276.7.  Compounds wherein the polycyclo ring system is bicyclo and consists of the following basic structure in which the bonds between the ring members may be single or double bonds:

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(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 277.4]    277.4Bicyclo ring system which is indole (including hydrogenated):
 This subclass is indented under subclass 276.7.  Compounds wherein the polycyclo ring system is bicyclo and consists of the following basic structure in which the bonds between the ring members may be single or double bonds:

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[List of Patents for class 546 subclass 277.7]    277.7Chalcogen attached directly to the five-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 277.4.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the five-membered hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 278.1]    278.1Having -C(=X)-, wherein X is chalcogen, bonded directly to the five-membered hetero ring:
 This subclass is indented under subclass 277.4.  Compounds in which -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the five-membered hetero ring.
  
[List of Patents for class 546 subclass 278.4]    278.4Chalcogen attached directly to the five-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 276.4.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the five-membered hetero ring by nonionic bonding.
  
[List of Patents for class 546 subclass 278.7]    278.7Plural chalcogens attached directly to the five-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 278.4.  Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are attached directly to the five-membered hetero ring by nonionic bonding.
  
[List of Patents for class 546 subclass 279.1]    279.1Nitrogen or -C(=X)-, wherein X is chalcogen, attached directly to the five-membered ring by nonionic bonding:
 This subclass is indented under subclass 276.4.  Compounds in which nitrogen or -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the five-membered hetero ring by nonionic bonding.
  
[List of Patents for class 546 subclass 279.4]    279.4Nicotine, per se, or its salts:
 This subclass is indented under subclass 276.4.  Compounds which have the following structure, or salts thereof:

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(1) Note. In addition to nicotine, included herein are salts thereof, such as, nicotine sulfate.

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[List of Patents for class 546 subclass 279.7]    279.7Ring sulfur in the additional hetero ring:
 This subclass is indented under subclass 268.1.  Compounds wherein the additional hetero ring contains ring sulfur.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 280.1]    280.1The additional hetero ring is six-membered:
 This subclass is indented under subclass 279.7.  Compounds wherein six ring atoms are present in the additional hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 280.4]    280.4The additional hetero ring is five-membered:
 This subclass is indented under subclass 279.7.  Compounds wherein five ring atoms are present in the additional hetero ring.
  
[List of Patents for class 546 subclass 280.7]    280.7Plural ring sulfurs in the additional hetero ring:
 This subclass is indented under subclass 280.4.  Compounds in which the additional hetero ring contains at least two ring sulfurs.
  
[List of Patents for class 546 subclass 281.1]    281.1Polycyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 280.4.  Compounds wherein the additional hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 546 subclass 281.4]    281.4Nitrogen attached directly to the six-membered hetero ring or to the additional hetero ring by nonionic bonding:
 This subclass is indented under subclass 280.4.  Compounds wherein the six-membered hetero ring or the additional hetero ring is attached directly to nitrogen by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 281.7]    281.7Ring oxygen in the additional hetero ring:
 This subclass is indented under subclass 268.1.  Compounds wherein the additional hetero ring contains ring oxygen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 282.1]    282.1The additional hetero ring is six-membered:
 This subclass is indented under subclass 281.7.  Compounds wherein six ring atoms are present in the additional hetero ring.
  
[List of Patents for class 546 subclass 282.4]    282.4Plural ring oxygens in the additional hetero ring:
 This subclass is indented under subclass 282.1.  Compounds in which the additional hetero ring contains at least two ring oxygens.
  
[List of Patents for class 546 subclass 282.7]    282.7Polycyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 282.1.  Compounds wherein the additional hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 546 subclass 283.1]    283.1Chalcogen attached directly to the additional hetero ring by nonionic bonding:
 This subclass is indented under subclass 282.7.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the additional hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 283.4]    283.4The additional hetero ring is five-membered:
 This subclass is indented under subclass 281.7.  Compounds wherein five ring atoms are present in the additional hetero ring.
  
[List of Patents for class 546 subclass 283.7]    283.7Plural ring oxygens in the additional hetero ring:
 This subclass is indented under subclass 283.4.  Compounds in which the additional hetero ring contains at least two ring oxygens.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 284.1]    284.1Polycyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 283.4.  Compounds wherein the additional hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 546 subclass 284.4]    284.4Chalcogen attached directly to the additional hetero ring by nonionic bonding:
 This subclass is indented under subclass 283.4.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the additional hetero ring by nonionic bonding.
  
[List of Patents for class 546 subclass 284.7]    284.7Nitrogen or -C(=X)-, wherein X is chalcogen, attached directly to the additional hetero ring by nonionic bonding:
 This subclass is indented under subclass 283.4.  Compounds in which nitrogen or -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached directly to the additional hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 285]    285Polycyclo-carbocyclic ring system having at least three cyclos:
 This subclass is indented under subclass 1.  Compounds which contain a polycyclco-carbocyclic ring system having at least three cyclos.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 286]    286Cyano bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 1.  Compounds which contain the C N group bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 287]    287Additional cyano containing:
 This subclass is indented under subclass 286.  Compounds which contain at least two -CbN groups.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 288]    288Chalcogen bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 286.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 289]    289Nitrogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 286.  Compounds wherein nitrogen is attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 290]    290Chalcogen bonded directly to ring carbon of the six-membered hetero ring:
 This subclass is indented under subclass 1.  Compounds which contain chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly to ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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SEE OR SEARCH THIS CLASS, SUBCLASS:

216,and 242+, for tautomers of chalcogen attached directly to pyridine or partially hydrogenated pyridine (i.e., chalcogen double bonded directly to piperidine), e.g.,

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[List of Patents for class 546 subclass 291]    291Chalcogen and acyclic nitrogen bonded directly to the same carbon:
 This subclass is indented under subclass 290.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) and acyclic nitrogen are bonded directly to the same carbon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 292]    292The chalcogen or the acyclic nitrogen is bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 291.  Compounds in which the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or the acyclic nitrogen is bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 293]    293Sulfur bonded directly to acyclic nitrogen:
 This subclass is indented under subclass 290.  Compounds which contain sulfur bonded directly to acyclic nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 294]    294Chalcogen bonded directly to chalcogen:
 This subclass is indented under subclass 290.  Compounds which contain chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly to chalcogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 295]    295Halogen bonded directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 294.  Compounds which contain halogen bonded directly to the six-membered hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 296]    296Plural chalcogens bonded directly to ring carbons of the six-membered hetero ring:
 This subclass is indented under subclass 290.  Compounds containing at least two chalcogens (i.e., oxygens, sulfur, selenium, or tellurium) which are bonded directly to ring carbons of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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SEE OR SEARCH THIS CLASS, SUBCLASS:

219,for tautomers of chalcogen attached directly to pyridine or partially hydrogenated pyridine (i.e., chalcogen double bonded directly to piperidine), e.g.,

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[List of Patents for class 546 subclass 297]    297Nitrogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 290.  Compounds which contain nitrogen attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 298]    298Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 290.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 299]    299Plural -C(=X)- groups, wherein X Is chalcogen, bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 298.  Compounds which contain at least two groups bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 300]    300Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 290.  Compounds in which nitrogen is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 301]    301Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 290.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 302]    302Halogen attached directly or indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 301.  Compounds in which halogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compound provided for herein are:

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[List of Patents for class 546 subclass 303]    303Halogen attached directly or indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 290.  Compounds in which halogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 304]    304Nitrogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein nitrogen is attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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223,and 244, for tautomers of nitrogen attached directly to pyridine or partially hydrogenated pyridine (i.e., nitrogen double bonded directly to piperidine), e.g.,

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[List of Patents for class 546 subclass 305]    305Sulfur and acyclic nitrogen bonded directly to the same carbon:
 This subclass is indented under subclass 304.  Compounds which contain sulfur and acyclic nitrogen bonded directly to the same carbon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 306]    306Plural acyclic nitrogens bonded directly to the same carbon or single bonded directly to each other:
 This subclass is indented under subclass 304.  Compounds wherein at least two acyclic nitrogens are bonded directly to the same carbon or single bonded directly to each other.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 307]    307Plural nitrogens attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 304.  Compounds in which at least two nitrogens are attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 308]    308Acyclic nitrogen bonded directly to A -C(=X)- group, wherein X Is chalcogen:
 This subclass is indented under subclass 307.  Compounds in which acyclic nitrogen is bonded directly to a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 309]    309Acyclic nitrogen bonded directly to A -C(=X)- group, wherein X Is chalcogen:
 This subclass is indented under subclass 304.  Compounds in which acyclic nitrogen is bonded directly to a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 310]    310Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 304.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 311]    311The nitrogen bonded additionally only to hydrogen:
 This subclass is indented under subclass 304.  Compounds in which the remaining valences of the nitrogen are bonded only to hydrogen.
(1) Note. Examples of compounds provided for herein are:

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SEE OR SEARCH THIS CLASS, SUBCLASS:

223,and 244, for tautomers of nitrogen attached directly to pyridine or partially hydrogenated pyridine (i.e., nitrogen double bonded directly to piperidine), e.g.,

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[List of Patents for class 546 subclass 312]    312Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 304.  Compounds which contain chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 313]    313Thiocarbonyl bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 1.  Compounds wherein a group is bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 314]    314Carbonyl bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 1.  Compounds wherein a group is bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 315]    315At 3-position:
 This subclass is indented under subclass 314.  Compounds in which the carbonyl group is attached directly to the 3-posiiton of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 316]    316Acyclic nitrogen bonded directly to the carbonyl:
 This subclass is indented under subclass 315.  Compounds in which acyclic nitrogen is bonded directly to the carbonyl group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 317]    317Processes of obtaining nicotinamide, per se:
 This subclass is indented under subclass 316.  Processes whereby nicotinamide, i.e., pyridine-3-carboxylic acid amide, is prepared.
(1) Note. Nicotinamide is represented by the structure:

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[List of Patents for class 546 subclass 318]    318The carbonyl is in a -COO- group:
 This subclass is indented under subclass 315.  Compounds in which the carbonyl is part of a -COO- group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 319]    319Processes of obtaining nicotinic acid, per se, or a derivative of nicotinic acid wherein the only substituents are -COO- Groups, or salt thereof:
 This subclass is indented under subclass 318.  Processes for the preparation of nicotinic acid, per se, or of a derivative thereof wherein the only substituents are additional -COO- groups, or of salts thereof.
  
[List of Patents for class 546 subclass 320]    320By oxidation:
 This subclass is indented under subclass 319.  Processes wherein the nicotinic acid or carboxy derivative thereof is obtained by an oxidation reaction.
  
[List of Patents for class 546 subclass 321]    321Additional -COO- group bonded directly to the six-membered hetero ring:
 This subclass is indented under subclass 318.  Compounds which contain an additional -COO- group bonded directly to the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 322]    322Carbocyclic ring containing:
 This subclass is indented under subclass 318.  Compounds which contain a carbocyclic ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 323]    323Acyclic nitrogen bonded directly to the carbonyl:
 This subclass is indented under subclass 314.  Compounds in which acyclic nitrogen is bonded directly to the carbonyl group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 324]    324Acyclic nitrogen single bonded directly to acyclic nitrogen:
 This subclass is indented under subclass 323.  Compounds in which acyclic nitrogen is single bonded directly to acyclic nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 325]    325Carbon double bonded directly to one of the acyclic nitrogens:
 This subclass is indented under subclass 324.  Compounds in which carbon is double bonded directly to one of the acyclic nitrogens.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 326]    326The carbonyl is in a -COO- group:
 This subclass is indented under subclass 314.  Compounds in which the carbonyl group is part of a -COO- group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 327]    327Processes:
 This subclass is indented under subclass 326.  Processes of preparing, purifying, or recovering the carboxy containing pyridine compound.
  
[List of Patents for class 546 subclass 328]    328Acyclic nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 314.  Compounds wherein acyclic nitrogen is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 329]    329Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein nitrogen is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. An example of compounds provided for herein is:

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[List of Patents for class 546 subclass 330]    330Cyano attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 329.  Compounds in which a -CbN group is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 331]    331Sulfur and acyclic nitrogen bonded directly to the same carbon:
 This subclass is indented under subclass 329.  Compounds which contain a carbon atom to which is bonded directly sulfur and acyclic nitrogen.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 332]    332Plural acyclic nitrogens bonded directly to the same carbon or single bonded directly to each other:
 This subclass is indented under subclass 329.  Compounds wherein at least two acyclic nitrogens are bonded directly to the same carbon or single bonded directly to each other.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 333]    333The six-membered hetero ring and another ring bonded directly to the same carbon:
 This subclass is indented under subclass 329.  Compounds wherein the six-membered hetero ring and another ring are bonded directly to the same carbon.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 334]    334Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 329.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 335]    335The chalcogen, X, is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 334.  Compounds in which the chalcogen, X, is part of a group, wherein the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 336]    336Acyclic nitrogen bonded directly to A -C(=X)- group wherein X is chalcogen:
 This subclass is indented under subclass 334.  Compounds wherein acyclic nitrogen is bonded directly to a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 337]    337Additional ring containing:
 This subclass is indented under subclass 336.  Compounds which include an additional ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 338]    338Acyclic nitrogen bonded directly to chalcogen:
 This subclass is indented under subclass 334.  Compounds wherein acyclic nitrogen is bonded directly to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 339]    339Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding (e.g., sulfato betaines, etc.):
 This subclass is indented under subclass 1.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 340]    340The chalcogen, X, is in a -C(=X)- group:
 This subclass is indented under subclass 339.  Compounds in which the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in a group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 341]    341The -C(=X)- is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogen:
 This subclass is indented under subclass 340.  Compounds in which the is part of a group, wherein the X"s are the same or diverse chalcogens (i.e. oxygen, sulfur, selenium, or tellurium).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 546 subclass 342]    342Additional ring containing:
 This subclass is indented under subclass 341.  Compounds which contain an additional ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 343]    343The six-membered hetero ring and another ring bonded directly to the same carbon:
 This subclass is indented under subclass 339.  Compounds wherein the six-membered hetero ring and another ring are bonded directly to the same carbon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 344]    344The chalcogen is in an -OH or -OM group (M is group IA or group IIA light metal):
 This subclass is indented under subclass 339.  Compounds in which the chalcogen is part of an -OH or -OM group; wherein M is a Group IA or Group IIA metal having a specific gravity less than four.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 345]    345Halogen attached directly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein halogen is attached directly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 346]    346Halogen attached indirectly to the six-membered hetero ring by nonionic bonding:
 This subclass is indented under subclass 1.  Compounds wherein halogen is attached indirectly to the six-membered hetero ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 347]    347The ring nitrogen of the six-membered hetero ring is pentavalent (e.g., quaternary pyridinium salts, etc.):
 This subclass is indented under subclass 1.  Compounds in which the ring nitrogen of the six-membered ring is pentavalent.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 348]    348Unsubstituted or hydrocarbyl substituted only or salts thereof:
 This subclass is indented under subclass 1.  Compounds in which the six-membered hetero ring is unsubstituted or substituted by hydrocarbon radicals only, or salts thereof.
(1) Note. Hydrocarbon radicals consist of carbon and hydrogen only. A substituent containing any other atom would not be provided for herein.
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 349]    349Alkylation or dealkylation process:
 This subclass is indented under subclass 348.  Processes in which an alkyl group is formed or removed.
  
[List of Patents for class 546 subclass 350]    350Unsaturated hydrocarbyl side chain:
 This subclass is indented under subclass 348.  Compounds which contain an unsaturated hydrocarbon side chain.
(1) Note. An unsaturated hydrocarbon side chain is a chain consisting of carbon and hydrogen which contains at least one double or triple bond.
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 546 subclass 351]    351Stabilized alkenyl pyridines:
 This subclass is indented under subclass 350.  Compounds which are alkenyl substituted pyridines that have been stabilized against polymerization.
(1) Note. This stabilization is normally accomplished by adding to the alkenyl pyridine a polymerization inhibiting amount of certain compounds, such as an alkali-metal polysulfide, an iron halide, an indigo, etc.
  
[List of Patents for class 546 subclass 352]    352Process of forming the unsaturated hydrocarbyl side chain:
 This subclass is indented under subclass 350.  Processes whereby the unsaturated hydrocarbon side chain on the six-membered hetero ring is formed.
(1) Note. Examples of processes provided for herein are:

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[List of Patents for class 546 subclass 353]    353Purification or recovery:
 This subclass is indented under subclass 348.  Processes wherein the unsubstituted or hydrocarbyl substituted pyridine is separated from impurities or from the reaction medium.
(1) Note. This subclass provides for such processes as the vapor phase separation or 2,6-lutidine from beta- and gamma-picolines, the separation of aromatic pyridines using alkylene carbonates, the recovery of pyridine bases, the purification of 3-picoline, etc.
  

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