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 [Search a list of Patent Appplications for class 544]   CLASS 544,ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES
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SUBCLASSES

[List of Patents for class 544 subclass 1]    1Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 540, ... which contain a six-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen.

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588Hazardous or Toxic Waste Destruction or Containment,   appropriate subclasses for the chemical destruction of hazardous or toxic waste.
  
[List of Patents for class 544 subclass 2]    2Six-membered hetero ring consists of oxygen, sulfur, nitrogen and carbon (e.g., oxathiazines, etc.)
 This subclass is indented under subclass 1.  Compounds wherein the six- membered hetero ring includes at least one atom each of oxygen, sulfur, nitrogen and carbon and contains no other elements as ring members.
  
[List of Patents for class 544 subclass 3]    3Six-membered hetero ring consists of sulfur, nitrogen, and carbon
 This subclass is indented under subclass 1.  Compounds wherein the six- membered hetero ring includes at least one atom each of sulfur, nitrogen and carbon and contains no other elements as ring members.
  
[List of Patents for class 544 subclass 4]    4Heavy metal or aluminum containing
 This subclass is indented under subclass 3.  Compounds which include aluminum or a metal having a specific gravity greater than four.
(1) Note. Arsenic is considered a metal.
  
[List of Patents for class 544 subclass 5]    5Plural sulfurs in the six-membered hetero ring (e.g., dithiazines, etc.)
 This subclass is indented under subclass 3.  Compounds wherein the six-membered hetero ring contains at least two ring sulfurs in addition to the nitrogen and carbon.
  
[List of Patents for class 544 subclass 6]    6Spiro
 This subclass is indented under subclass 3.  Compounds which contain a spiro ring system.
  
[List of Patents for class 544 subclass 7]    7Plural nitrogens in the six-membered hetero ring (e.g., thiatriazines, etc.)
 This subclass is indented under subclass 3.  Compounds wherein the six-membered hetero ring contains at least two atoms of nitrogen in addition to the sulfur and carbon.
  
[List of Patents for class 544 subclass 8]    8Thiadiazines
 This subclass is indented under subclass 7.  Compounds wherein the six-membered hetero ring consists of two nitrogen atoms, one sulfur atom and three carbon atoms.
  
[List of Patents for class 544 subclass 9]    9Polycyclo ring system having the thiadiazine ring as one of the cyclos
 This subclass is indented under subclass 8.  Compounds wherein the thiadiazine ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 10]    10Bicyclo ring system having the thiadiazine ring as one of the cyclos
 This subclass is indented under subclass 9.  Compounds wherein the polycyclo ring system consists of two rings, one of which is the thiadiazine ring.
  
[List of Patents for class 544 subclass 11]    11Benzothiadiazines
 This subclass is indented under subclass 10.  Compounds wherein the bicyclo ring system consists of the thiadiazine ring and a benzene ring.
  
[List of Patents for class 544 subclass 12]    121,2,4-benzothiadiazines
 This subclass is indented under subclass 11.  Compounds wherein the sulfur atom is in the 1-position and the nitrogen atoms are in the 2- and 4-positions of the six-membered hetero ring.
(1) Note. An example of a structure provided for herein is:

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[List of Patents for class 544 subclass 13]    13Sulfamyl or substituted sulfamyl containing
 This subclass is indented under subclass 12.  Compounds which contain a sulfamyl or substituted sulfamyl group; viz., -SO2N or -SO2N=.
(1) Note. The diuretic 1, 2, 4-benzothiadiazines with benzosulfamyl substituents are provided for herein.
  
[List of Patents for class 544 subclass 14]    14Polycyclo ring system having the six-membered hetero ring as one of the cyclos
 This subclass is indented under subclass 3.  Compounds wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 31]    31Phenothiazine as three cyclos of polycyclo ring system having at least four cyclos
 This subclass is indented under subclass 14.  Compounds wherein the polycyclo ring system contains four or more rings of which three form the phenothiazine structure.
(1) Note. This subclass provides for compounds such as the structures below, etc.:

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[List of Patents for class 544 subclass 32]    32Tricyclo ring system having the six-membered hetero ring as one of the cyclos
 This subclass is indented under subclass 14.  Compounds in which the polycyclo ring system consists of three rings, one of which is the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as:

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[List of Patents for class 544 subclass 33]    331,2- or 2,1-Thiazine ring in the tricyclo ring system (e.g., hydrogenated 1,2-benzothiazine in tricyclo ring system, etc.)
 This subclass is indented under subclass 32.  Compounds in which the ring sulfur and ring nitrogen of the six-membered hetero ring are in adjacent positions.
(1) Note. This subclass provides for compounds such as:

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[List of Patents for class 544 subclass 34]    34Plural ring nitrogens in the tricyclo ring system
 This subclass is indented under subclass 32.  Compounds wherein the tricyclo ring system contains at least two ring nitrogens.
(1) Note. This subclass provides for compounds such as the structures below, etc.:

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[List of Patents for class 544 subclass 35]    35Phenothiazines (including hydrogenated)
 This subclass is indented under subclass 32.  Compounds wherein the tricyclo ring system has the following basic structure, in which the bonds between ring members may be double or single bonds.

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[List of Patents for class 544 subclass 36]    36Purification or recovery
 This subclass is indented under subclass 35.  Processes wherein the phenothiazine containing compound is separated from impurities or from the reaction mixture.
  
[List of Patents for class 544 subclass 37]    37Nitrogen bonded directly to phenothiazine ring system
 This subclass is indented under subclass 35.  Compounds which include nitrogen bonded directly to the phenothiazine ring system.
(1) Note. This subclass provides largely for phenothiazine dyes which have one or more substituted amino groups on the benzo moiety, such as leuco methylene blue,

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(2) Note. This subclass also provides for any nitrogen containing substituent wherein the nitrogen atom is bonded directly to the benzo rings; e.g., the structure below.

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[List of Patents for class 544 subclass 38]    38Carbon bonded directly to ring nitrogen of phenothiazine ring system
 This subclass is indented under subclass 35.  Compounds which contain carbon bonded directly to the ring nitrogen of the phenothiazine ring system.
  
[List of Patents for class 544 subclass 39]    39Divalent chalcogen double bonded directly to the carbon
 This subclass is indented under subclass 38.  Compounds wherein divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to the carbon which is bonded directly to the ring nitrogen of the phenothiazine ring system.
  
[List of Patents for class 544 subclass 40]    40Additional chalcogen bonded directly to the carbon
 This subclass is indented under subclass 39.  Compounds which include the structure below bonded directly to the ring nitrogen of the phenothiazine ring system, or an analog of another chalcogen (i.e., oxygen, sulfur, selenium or tellurium).

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[List of Patents for class 544 subclass 41]    41Nitrogen containing substituent bonded to nitrogen of phenothiazine ring system
 This subclass is indented under subclass 38.  Compounds wherein a nitrogen containing substituent is bonded directly to the ring nitrogen of the phenothiazine ring system.
(1) Note. This subclass provides for phenothiazines of the following type:

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[List of Patents for class 544 subclass 42]    42Nitrogen containing hetero ring in the nitrogen containing substituent (e.g., oxazole, etc.)
 This subclass is indented under subclass 41.  Compounds in which the nitrogen containing substituent includes a hetero ring, which hetero ring has at least nitrogen as a ring hetero atom.
(1) Note. Examples of compounds provided for herein are:

(a)

(a)

(b)

(b)

(2) Note. The substituent may contain a phenothiazine ring as its nitrogen containing hetero ring.
  
[List of Patents for class 544 subclass 43]    43Plural hetero rings in the nitrogen containing substituent
 This subclass is indented under subclass 42.  Compounds in which the nitrogen containing substituent includes at least two hetero rings.
(1) Note. Included in this subclass are structures such as:

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[List of Patents for class 544 subclass 44]    44Piperazine ring in the nitrogen containing substituent
 This subclass is indented under subclass 42.  Compounds in which the hetero ring in the nitrogen containing substituent is a fully hydrogenated six-membered ring having nitrogen in the 1- and 4-positions and carbon in the other four positions.
  
[List of Patents for class 544 subclass 45]    45Chalcogen in the nitrogen containing substituent
 This subclass is indented under subclass 44.  Compounds which include chalcogen (i.e., oxygen, sulfur, selenium or tellurium) in the nitrogen containing substituent.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 46]    46Chalcogen in the nitrogen containing substituent
 This subclass is indented under subclass 42.  Compounds which include chalcogen (i.e., oxygen, sulfur, selenium or tellurium) in the nitrogen containing substituent.
  
[List of Patents for class 544 subclass 47]    47Bicyclo ring system having the six-membered hetero ring as one of the cyclos
 This subclass is indented under subclass 14.  Compounds wherein the polycyclo ring system consists of exactly two rings, one of which is the six-membered hetero ring.
(1) Note. An example of a compo und provided for herein is:

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[List of Patents for class 544 subclass 48]    48Three or more ring hetero atoms in the bicyclo ring system
 This subclass is indented under subclass 47.  Compounds wherein the bicyclo ring system contains at least one ring hetero atom in addition to the ring sulfur and ring nitrogen of the thiazine ring.
(1) Note. An example of a structure provided for herein is:

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[List of Patents for class 544 subclass 49]    49Benzothiazines (including hydrogenated)
 This subclass is indented under subclass 47.  Compounds wherein the bicyclo ring system consists of a benzene ring sharing two adjacent carbons of the six-membered hetero ring.
(1) Note. The following shows the position numbering used for benzothiazines: It is pointed out that the two carbons common to both rings are not numbered. The nitrogen and sulfur may be in any of positions 1, 2, 3, and 4.

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(2) Note. Examples of compounds provided for herein are:

and

and

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[List of Patents for class 544 subclass 50]    501,3- or 3,1-benzothiazines
 This subclass is indented under subclass 49.  Compounds wherein the ring hetero atoms of the benzothiazine ring system are in the 1-and 3-positions.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 51]    511,4-benzothiazines
 This subclass is indented under subclass 49.  Compounds wherein the sulfur and nitrogen atoms of the benzothiazine ring system are in para-position to each other.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 52]    52Double bonded divalent chalcogen containing
 This subclass is indented under subclass 51.  Compounds which include a double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
(1) Note. This subclass is intended to include compounds such as:

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[List of Patents for class 544 subclass 53]    531,3-thiazines
 This subclass is indented under subclass 3.  Compounds wherein the six-membered hetero ring has sulfur in the 1-position, nitrogen in the 3-position and carbon in the other four positions.
(1) Note. This subclass provides for compounds containing the following ring which may have double bonds.

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[List of Patents for class 544 subclass 54]    54Double bonded divalent chalcogen containing
 This subclass is indented under subclass 53.  Compounds which include a double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
  
[List of Patents for class 544 subclass 55]    55Additional hetero ring containing
 This subclass is indented under subclass 53.  Compounds which include an additional hetero ring.
  
[List of Patents for class 544 subclass 56]    561,4-thiazines
 This subclass is indented under subclass 3.  Compounds wherein the six-membered hetero ring has sulfur in the 1-position, nitrogen in the 4-position and carbon in the other four positions.
  
[List of Patents for class 544 subclass 57]    57Phosphorus containing
 This subclass is indented under subclass 56.  Compounds which include phosphorus in a salt or attached by nonionic bonding.
  
[List of Patents for class 544 subclass 58.1]    58.1Double bonded divalent chalcogen containing
 This subclass is indented under subclass 56.  Compounds which include double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
  
[List of Patents for class 544 subclass 58.2]    58.2Divalent chalcogen double bonded directly to the thiazine ring
 This subclass is indented under subclass 58.1.  Compounds wherein divalent chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is double bonded directly to the thiazine ring.
  
[List of Patents for class 544 subclass 58.4]    58.4Having -C(=X)-, wherein X is chalcogen, bonded directly to the thiazine ring
 This subclass is indented under subclass 58.1.  Compounds wherein a group, in which X is chalcogen (i.e. oxygen, sulfur, selenium, or tellurium), is bonded directly to the thiazine ring.
  
[List of Patents for class 544 subclass 58.5]    58.5Additional hetero ring containing
 This subclass is indented under subclass 58.1.  Compounds which include an additional hetero ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

58.6,for compounds in which the additional hetero ring is also a thiazine ring.
  
[List of Patents for class 544 subclass 58.6]    58.6Ring nitrogen in the additional hetero ring, which is six-membered
 This subclass is indented under subclass 58.5.  Compounds having, in addition to the thiazine ring, a six-membered hetero ring which has at least one ring nitrogen.
(1) Note. The additional six-membered hetero ring may be another thiazine ring.
  
[List of Patents for class 544 subclass 58.7]    58.7Ring chalcogen in the additional hetero ring
 This subclass is indented under subclass 58.5.  Compounds having, in addition to the thiazine ring, a hetero ring which includes a 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 544 subclass 59]    59Thiomorpholines (i.e., fully hydrogenated 1,4-thiazines)
 This subclass is indented under subclass 56.  Compounds in which the six-membered hetero ring contains no double bonds.
  
[List of Patents for class 544 subclass 60]    60Additional hetero ring containing
 This subclass is indented under subclass 59.  Compounds which include an additional hetero ring.
(1) Note. This subclass provides for salts of heterocyclic compounds with thiomorpholine, e.g., illustrated below, etc.

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[List of Patents for class 544 subclass 61]    61The additional hetero ring is one of the cyclos in a bicyclo ring system
 This subclass is indented under subclass 60.  Compounds wherein the additional hetero ring is a cyclo in a bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 62]    62Benzo is the other cyclo
 This subclass is indented under subclass 61.  Compounds wherein a benzene ring is the other cyclo of the bicyclo ring system.
  
[List of Patents for class 544 subclass 63]    63Six-membered hetero ring consists of oxygen, nitrogen and carbon (e.g., 1,2-oxazines, etc)
 This subclass is indented under subclass 1.  Compounds in which the six-membered hetero ring consists of oxygen, nitrogen and carbon.
(1) Note. An oxazine ring in a polycyclo ring system is numbered as if it were a single ring and not part of a ring system: therefore, in each of the following:

the oxazine ring is considered to be 1, 3-oxazine and classifiedaccordingly.

the oxazine ring is considered to be 1, 3-oxazine and classifiedaccordingly.

  
[List of Patents for class 544 subclass 64]    64Heavy metal or aluminum containing
 This subclass is indented under subclass 63.  Compounds which contain aluminum or a metal with a specific gravity greater than 4.
(1) Note. Arsenic is considered a metal for the purposes of this subclass.
  
[List of Patents for class 544 subclass 65]    65Plural oxygens in the six-membered hetero ring
 This subclass is indented under subclass 63.  Compounds wherein the six-membered ring contains at least two ring oxygens.
  
[List of Patents for class 544 subclass 66]    66Plural nitrogens in the six-membered hetero ring
 This subclass is indented under subclass 63.  Compounds wherein the six-membered ring contains at least two ring nitrogens.
  
[List of Patents for class 544 subclass 67]    671,3,5-oxadiazines
 This subclass is indented under subclass 66.  Compounds wherein oxygen is in the 1-position, nitrogen is in the 3- and 5-positions and carbon is in the remaining three positions of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 68]    68Oxygen bonded directly to the six-membered hetero ring
 This subclass is indented under subclass 66.  Compounds in which oxygen is bonded directly to the six-membered ring.
  
[List of Patents for class 544 subclass 69]    69Boron or silicon containing
 This subclass is indented under subclass 63.  Compounds which contain boron or silicon.
  
[List of Patents for class 544 subclass 70]    70Spiro
 This subclass is indented under subclass 63.  Compounds which contain a spiro ring system.
  
[List of Patents for class 544 subclass 71]    71Spiro oxazine
 This subclass is indented under subclass 70.  Compounds wherein at least one of the rings in the spiro ring system is a six-membered hetero ring consisting of oxygen, nitrogen and carbon.
  
[List of Patents for class 544 subclass 72]    72Plural oxazine rings
 This subclass is indented under subclass 63.  Compounds having at least two six-membered hetero rings each consisting of one ring oxygen, one ring nitrogen and four ring carbons.
  
[List of Patents for class 544 subclass 73]    73Polycyclo ring system having oxazine ring as at least one of the cyclos
 This subclass is indented under subclass 72.  Compounds in which at least one of the six-membered hetero rings is a cyclo of a polycyclo ring system.
  
[List of Patents for class 544 subclass 74]    74Plural 1,4-oxazine rings are cyclos in the polycyclo ring system
 This subclass is indented under subclass 73.  Compounds wherein the polycyclo ring system contains at least two of the six-membered hetero rings, each having its oxygen in the 1-position and its nitrogen in the 4-position.
  
[List of Patents for class 544 subclass 75]    75Pentacyclo ring system having the oxazine rings as cyclos
 This subclass is indented under subclass 74.  Compounds in which the polycyclo ring system is composed of exactly five rings.
  
[List of Patents for class 544 subclass 76]    76Plural nitrogens bonded directly to the pentacyclo ring system
 This subclass is indented under subclass 75.  Compounds in which two or more nitrogen atoms are directly bonded to the pentacyclo ring system.
  
[List of Patents for class 544 subclass 77]    77Acyclic nitrogen is bonded directly to a -C(=X)- group, wherein X is chalcogen
 This subclass is indented under subclass 76.  Compounds which contain nitrogen bonded directly to a group, wherein X is chalcogen (i.e. oxygen, sulfur, selenium, or tellurium).
  
[List of Patents for class 544 subclass 78]    78Plural morpholine rings (i.e., plural fully hydrogenated 1, 4-oxazine rings)
 This subclass is indented under subclass 72.  Compounds which contain at least two of the six-membered hetero rings, each having its oxygen in the 1-position, its nitrogen in the 4-position, and having no double bonds between ring members, i.e., morpholine rings.

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69,for compounds having plural morpholine rings and silicon or boron.
  
[List of Patents for class 544 subclass 79]    79Polycyclo ring system
 This subclass is indented under subclass 78.  Compounds which contain a polycyclo ring system.
  
[List of Patents for class 544 subclass 80]    80Ring nitrogen in the polycyclo ring system
 This subclass is indented under subclass 79.  Compounds in which a nitrogen containing hetero ring is part of the polycyclo ring system.
  
[List of Patents for class 544 subclass 81]    81Four or more ring nitrogens in the polycyclo ring system
 This subclass is indented under subclass 80.  Compounds in which the polycyclo 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 544 subclass 82]    82Additional nitrogen containing hetero ring (e.g., thiazole, etc.)
 This subclass is indented under subclass 78.  Compounds which have, in addition to the morpholine rings, another hetero ring which has a ring nitrogen.
  
[List of Patents for class 544 subclass 83]    83Triazine
 This subclass is indented under subclass 82.  Compounds in which the additional hetero ring is six-membered having three ring nitrogens and three ring carbons.
  
[List of Patents for class 544 subclass 84]    84Phosphorus attached directly or indirectly to a morpholine ring by nonionic bonding
 This subclass is indented under subclass 78.  Compounds wherein phosphorus is attached directly or indirectly to a morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 85]    85Sulfur attached directly or indirectly to a morpholine ring by nonionic bonding
 This subclass is indented under subclass 78.  Compounds wherein sulfur is attached directly or indirectly to a morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 86]    86Nitrogen attached directly or indirectly to a morpholine ring by nonionic bonding
 This subclass is indented under subclass 78.  Compounds wherein nitrogen is attached directly or indirectly to a morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 87]    87Oxygen attached directly or indirectly to a morpholine ring by nonionic bonding
 This subclass is indented under subclass 78.  Compounds wherein oxygen is attached directly or indirectly to a morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 88]    881,3-Oxazines
 This subclass is indented under subclass 63.  Compounds wherein the six-membered hetero ring has oxygen in the 1-position, nitrogen in the 3-position and carbons in the remaining four positions.
  
[List of Patents for class 544 subclass 89]    89Polycyclo ring system having the oxazine ring as one of the cyclos
 This subclass is indented under subclass 88.  Compounds wherein the six-membered hetero ring is a cyclo in a polycyclo ring system.
(1) Note. An oxazine ring in a polycyclo ring system is numbered as if it were a single ring and not part of a ring system; therefore, in each of the following:

the oxazine ring is considered to be 1, 3-oxazine and classifiedaccordingly.

the oxazine ring is considered to be 1, 3-oxazine and classifiedaccordingly.

  
[List of Patents for class 544 subclass 90]    90Bicyclo ring system having the oxazine ring as one of the cyclos
 This subclass is indented under subclass 89.  Compounds in which the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 91]    91Three or more ring hetero atoms in the bicyclo ring system
 This subclass is indented under subclass 90.  Compounds wherein the bicyclo ring system includes at least one ring hetero atom in addition to the ring oxygen and ring nitrogen of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 92]    92Chalcogen bonded directly to the oxazine ring
 This subclass is indented under subclass 90.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 93]    93Plural oxygens bonded directly to the oxazine ring
 This subclass is indented under subclass 92.  Compounds wherein at least two oxygen atoms are bonded directly to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 94]    94Plural oxygens bonded directly to the oxazine ring 3,1-Benzoxazine-2,4- diones (including hydrogenated)
 This subclass is indented under subclass 93.  Compounds which contain the isatoic anhydride configuration, wherein there may be double or single bonds between ring members.

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[List of Patents for class 544 subclass 95]    95Three or more ring hetero atoms in the polycyclo ring system
 This subclass is indented under subclass 89.  Compounds wherein the polycyclo ring system includes at least one ring hetero atom in addition to the ring oxygen and ring nitrogen of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 96]    96Additional hetero ring containing
 This subclass is indented under subclass 88.  Compounds which contain a hetero ring in addition to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 97]    97Chalcogen bonded directly to the oxazine ring
 This subclass is indented under subclass 88.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 98]    981,4-Oxazines
 This subclass is indented under subclass 63.  Compounds wherein the six-membered hetero ring has oxygen in the 1-position, nitrogen in the 4-position and carbons in the remaining four positions.
  
[List of Patents for class 544 subclass 99]    99Polycyclo ring system having the oxazine ring as one of the cyclos
 This subclass is indented under subclass 98.  Compounds wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.
(1) Note. The positions of the six-membered hetero ring when it is part of a polycyclo ring system are numbered as if it were a single ring.
  
[List of Patents for class 544 subclass 100]    100Anthrone or anthraquinone in the polycyclo ring system
 This subclass is indented under subclass 99.  Compounds which contain anthrone or anthraquinone as three cyclos of the polycyclo ring system.
  
[List of Patents for class 544 subclass 101]    101Tricyclo ring system having the oxazine ring as one of the cyclos
 This subclass is indented under subclass 99.  Compounds wherein the polycyclo ring system consists of three rings.
  
[List of Patents for class 544 subclass 102]    102Phenoxazines (including hydrogenated)
 This subclass is indented under subclass 101.  Compounds wherein the tricyclo ring system has the following basic structure, illustrated below, in which the bonds between ring members may be single or double bonds.

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(1) Note. This subclass provides for any compound which contains the phenoxazine skeleton, regardless of the degree of saturation or the shifting of double bonds, for example, as illustrated below, etc.

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(2) Note. The gallocyanine dyes are found in this and indented subclasses.
  
[List of Patents for class 544 subclass 103]    103Plural nitrogens bonded directly to the phenoxazine
 This subclass is indented under subclass 102.  Compounds wherein two or more nitrogen atoms are bonded directly to the phenoxazine ring system.
  
[List of Patents for class 544 subclass 104]    104Sulfur containing
 This subclass is indented under subclass 102.  Compounds which include sulfur.
  
[List of Patents for class 544 subclass 105]    105Bicyclo ring system having the oxazine ring as one of the cyclos (e.g., benzoxazines, etc.)
 This subclass is indented under subclass 99.  Compounds in which the polycyclo ring system consists of two rings.
  
[List of Patents for class 544 subclass 106]    106Morpholines (i.e., fully hydrogenated 1,4-oxazines
 This subclass is indented under subclass 98.  Compounds wherein the six-membered hetero ring, having oxygen in the 1-position and nitrogen in the 4-position, has no double bonds between ring members.
  
[List of Patents for class 544 subclass 107]    107Addition salts of morpholine which is unsubstituted or hydrocarbyl substituted only
 This subclass is indented under subclass 106.  Compounds which are acid addition salts of (a) unsubstituted morpholine, or (b) morpholine substituted by hydrocarbon radicals only.
(1) Note. Examples of compounds provided for herein are:

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(2) Note. The substituents attached to the morpholine ring by nonionic bonding must contain only hydrogen and carbon.
  
[List of Patents for class 544 subclass 108]    108N, N-dihydrocarbyl morpholinium
 This subclass is indented under subclass 107.  Compounds in which the nitrogen atom of the morpholine ring is disubstituted with hydrocarbon moieties.
(1) Note. An example of an N, N-disubstituted compound provided for herein is:

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[List of Patents for class 544 subclass 109]    109Hetero ring in ionically bonded moiety
 This subclass is indented under subclass 107.  Compounds which contain a hetero ring in the portion of the compound which is ionically bonded to the morpholine ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 110]    110Phosphorus or sulfur in ionically bonded moiety
 This subclass is indented under subclass 107.  Compounds which include phosphorus or sulfur in the portion of the compound which is ionically bonded to the morpholine ring.
  
[List of Patents for class 544 subclass 111]    111Additional nitrogen containing hetero ring (e.g., thiazetidine, etc.)
 This subclass is indented under subclass 106.  Compounds having, in addition to the morpholine ring, a hetero ring which includes a ring nitrogen.
  
[List of Patents for class 544 subclass 112]    112Triazine ring
 This subclass is indented under subclass 111.  Compounds in which the additional hetero ring is six-membered consisting of three ring nitrogens and three ring carbons.
  
[List of Patents for class 544 subclass 113]    1131,3,5-Triazine ring
 This subclass is indented under subclass 112.  Compounds in which the three ring nitrogens of the additional six-membered hetero ring occupy the 1, 3, 5-positions.
  
[List of Patents for class 544 subclass 114]    114Diazine ring
 This subclass is indented under subclass 111.  Compounds in which the additional hetero ring is six-membered consisting of two ring nitrogens and four ring carbons.
  
[List of Patents for class 544 subclass 115]    115The diazine ring is one of the cyclos in a polycyclo ring system
 This subclass is indented under subclass 114.  Compounds in which the additional six-membered hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 116]    116The diazine ring is one of the cyclos in a bicyclo ring system
 This subclass is indented under subclass 115.  Compounds in which the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 117]    117Three or more ring hetero atoms in the bicyclo ring system
 This subclass is indented under subclass 116.  Compounds wherein the bicyclo ring system contains at least one ring hetero atom in addition to the two ring nitrogens of the additional six-membered hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 118]    118Four or more ring nitrogens in the bicyclo ring system
 This subclass is indented under subclass 117.  Compounds wherein the bicyclo ring system cont
  
[List of Patents for class 544 subclass 119]    119Acyclic nitrogen containing
 This subclass is indented under subclass 116.  Compounds which include acyclic nitrogen.
  
[List of Patents for class 544 subclass 120]    1201,4-Diazine ring
 This subclass is indented under subclass 114.  Compounds in which the nitrogen atoms of the additional six-membered hetero ring are in the 1, 4-positions.
  
[List of Patents for class 544 subclass 121]    121Piperazine ring
 This subclass is indented under subclass 120.  Compounds in which the additional six-membered hetero ring is completely hydrogenated.
  
[List of Patents for class 544 subclass 122]    1221,3-Diazine ring
 This subclass is indented under subclass 114.  Compounds in which the nitrogen atoms of the additional six-membered hetero ring are in the 1, 3-positions.
  
[List of Patents for class 544 subclass 123]    123Oxygen bonded directly to the diazine ring
 This subclass is indented under subclass 122.  Compounds in which oxygen is bonded directly to the additional six-membered hetero ring.
  
[List of Patents for class 544 subclass 124]    124Six-membered ring consisting of one nitrogen and five carbons (e.g., pyridine, etc.)
 This subclass is indented under subclass 111.  Compounds in which the additional hetero ring is a six-membered ring consisting of one ring nitrogen and five ring carbons.
  
[List of Patents for class 544 subclass 125]    125The additional six-membered hetero ring is one of the cyclos in a polycyclo ring system
 This subclass is indented under subclass 124.  Compounds in which the additional six-membered hetero ring is a cyclo of a polycyclo ring system.
  
[List of Patents for class 544 subclass 126]    126The additional six-membered hetero ring is one of the cyclos in a tricyclo ring system
 This subclass is indented under subclass 125.  Compounds in which the polycyclo ring system consists of exactly three rings.
  
[List of Patents for class 544 subclass 127]    127The additional six-membered hetero ring is one of the cyclos in a bicyclo ring system
 This subclass is indented under subclass 125.  Compounds in which the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 128]    128Quinoline or isoquinoline (including hydrogenated)
 This subclass is indented under subclass 127.  Compounds wherein the bicyclo ring system is characterized by having a six-membered carbocyclic ring ortho-fused to two carbons of the additional six-membered hetero ring.
  
[List of Patents for class 544 subclass 129]    129Piperidine ring
 This subclass is indented under subclass 124.  Compounds in which the additional six-membered hetero ring has no double bonds between ring members.
  
[List of Patents for class 544 subclass 130]    130Double bonded divalent chalcogen containing
 This subclass is indented under subclass 129.  Compounds which include double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
  
[List of Patents for class 544 subclass 131]    131Double bonded divalent chalcogen containing
 This subclass is indented under subclass 124.  Compounds which include double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
  
[List of Patents for class 544 subclass 132]    132Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen
 This subclass is indented under subclass 111.  Compounds in which the additional hetero ring is five-membered having two or more ring hetero atoms, at least one of which is nitrogen.
  
[List of Patents for class 544 subclass 133]    133The five-membered hetero ring has at least sulfur and nitrogen as ring hetero atoms
 This subclass is indented under subclass 132.  Compounds in which the five-membered hetero ring contains a ring sulfur, in addition to the ring nitrogen, as a ring hetero atom.
  
[List of Patents for class 544 subclass 134]    134Plural sulfurs or nitrogens in the five-membered hetero ring (e.g., thiatriazole, etc.)
 This subclass is indented under subclass 133.  Compounds in which the five-membered hetero ring contains at least two ring nitrogens or at least two ring sulfurs.
  
[List of Patents for class 544 subclass 135]    135Benzothiazoles (including hydrogenated)
 This subclass is indented under subclass 133.  Compounds wherein a six-membered carbocyclic ring is ortho-fused to two carbons of the five-membered hetero ring forming a bicyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 136]    136Polysulfide containing chain between morpholine ring and benzothiazole ring system
 This subclass is indented under subclass 135.  Compounds which contain a polysulfide linkage between the bicyclo ring system and the morpholine ring.

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(1) Note. An example of a compound provided for in this subclass (where x is greater than or equal to 2) is:

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[List of Patents for class 544 subclass 137]    137The five-membered hetero ring has at least oxygen and nitrogen as ring hetero atoms
 This subclass is indented under subclass 132.  Compounds in which the five-membered hetero ring contains a ring oxygen, in addition to the ring nitrogen, as a ring hetero atom.
  
[List of Patents for class 544 subclass 138]    138Oxadiazole ring (including hydrogenated)
 This subclass is indented under subclass 137.  Compounds in which the five-membered hetero ring consists of one ring oxygen, two ring nitrogens and two ring carbons.
  
[List of Patents for class 544 subclass 139]    1391,3-Diazole ring (including hydrogenated)
 This subclass is indented under subclass 132.  Compounds in which the five-membered hetero ring has ring nitrogens in the 1- and 3-positions and ring carbons in the remaining three positions.
  
[List of Patents for class 544 subclass 140]    1401,2-Diazole ring (including hydrogenated)
 This subclass is indented under subclass 132.  Compounds in which the five-membered hetero ring has ringnitrogens in the 1- 2- positions and ring carbons in the remaining three positions.
  
[List of Patents for class 544 subclass 141]    141Five-membered hetero ring consisting of one nitrogen and four carbons
 This subclass is indented under subclass 111.  Compounds in which the five-membered hetero ring consists of one ring nitrogen and four ring carbons.
  
[List of Patents for class 544 subclass 142]    142The five-membered hetero ring is one of the cyclos in a polycyclo ring system
 This subclass is indented under subclass 141.  Compounds in which the five-membered hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 143]    143The five-membered hetero ring is one of the cyclos in a bicyclo ring system
 This subclass is indented under subclass 142.  Compounds in which the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 144]    144Chalcogen bonded directly to the bicyclo ring system
 This subclass is indented under subclass 143.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the bicyclo ring system.
  
[List of Patents for class 544 subclass 145]    145Sulfur containing hetero ring (e.g., thioxane, etc.)
 This subclass is indented under subclass 106.  Compounds having, in addition to the morpholine ring, a hetero ring which includes a ring sulfur.
  
[List of Patents for class 544 subclass 146]    146Thiophene ring (including hydrogenated)
 This subclass is indented under subclass 145.  Compounds wherein the additional hetero ring consists of one ring sulfur and four ring carbons.
  
[List of Patents for class 544 subclass 147]    147Additional oxygen containing hetero ring
 This subclass is indented under subclass 106.  Compounds having, in addition to the morpholine ring, a hetero ring which includes a ring oxygen.
  
[List of Patents for class 544 subclass 148]    148Plural ring hetero atoms in the additional hetero ring
 This subclass is indented under subclass 147.  Compounds wherein the additional hetero ring contains at least two ring hetero atoms.
  
[List of Patents for class 544 subclass 149]    149The additional hetero ring is six-membered
 This subclass is indented under subclass 147.  Compounds wherein the additional hetero ring is six-membered.
  
[List of Patents for class 544 subclass 150]    150The additional six-membered hetero ring is one of the cyclos in a polycyclo ring system
 This subclass is indented under subclass 149.  Compounds in which the additional hetero ring is a cyclo in a polycyclo ring system.
  
[List of Patents for class 544 subclass 151]    151The additional six-membered hetero ring is one of the cyclos in a bicyclo ring system
 This subclass is indented under subclass 150.  Compounds in which the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 152]    152The additional hetero ring is five-membered
 This subclass is indented under subclass 147.  Compounds wherein the additional hetero ring is five-membered.
  
[List of Patents for class 544 subclass 153]    153The five-membered hetero ring is one of the cyclos in a polycyclo ring system
 This subclass is indented under subclass 152.  Compounds in which the additional hetero ring is a cyclo in a polycyclo ring system.
  
[List of Patents for class 544 subclass 154]    154Polycyclo-carbocyclic ring system having at least three cyclos
 This subclass is indented under subclass 106.  Compounds having a polycyclo ring system which contains at least three carbocyclic rings.
  
[List of Patents for class 544 subclass 155]    155Tricyclo having three six-membered carbocyclic rings
 This subclass is indented under subclass 154.  Compounds in which the polycyclo ring system consists of exactly three six-membered carbocyclic rings.
  
[List of Patents for class 544 subclass 156]    156Anthrone or anthraquinone
 This subclass is indented under subclass 155.  Compounds wherein the tricyclo ring system is part of an anthrone or anthraquinone nucleus, or a hydrogenated form thereof.
  
[List of Patents for class 544 subclass 157]    157Phosphorus attached directly or indirectly to morpholine ring by nonionic bonding
 This subclass is indented under subclass 100.  Compounds wherein phosphorus is attached directly or indirectly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 158]    158Sulfur attached directly or indirectly to morpholine ring by nonionic bonding
 This subclass is indented under subclass 106.  Compounds wherein sulfur is attached directly or indirectly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 159]    159Nitrogen attached directly or indirectly to morpholine ring by nonionic bonding
 This subclass is indented under subclass 158.  Compounds wherein nitrogen is attached directly or indirectly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 160]    160Double bonded divalent sulfur
 This subclass is indented under subclass 159.  Compounds wherein the sulfur is a double bonded divalent atom (=S).
  
[List of Patents for class 544 subclass 161]    161Double bonded divalent sulfur
 This subclass is indented under subclass 158.  Compounds wherein the sulfur is a double bonded divalent atom (=S).
  
[List of Patents for class 544 subclass 162]    162Nitrogen attached directed or indirectly to morpholine ring by nonionic bonding
 This subclass is indented under subclass 106.  Compounds wherein nitrogen is attached directly or indirectly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 163]    163Cyano containing
 This subclass is indented under subclass 162.  Compounds which contain the -C=N group.
  
[List of Patents for class 544 subclass 164]    164Morpholine ring bonded directly to the nitrogen
 This subclass is indented under subclass 162.  Compounds wherein nitrogen is attached directly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 165]    165Carbocyclic ring bonded directly to the nitrogen
 This subclass is indented under subclass 162.  Compounds wherein nitrogen is attached directly to a carbocyclic ring by nonionic bonding.
  
[List of Patents for class 544 subclass 166]    166Morpholine ring bonded directly to the carbocyclic ring
 This subclass is indented under subclass 165.  Compounds wherein the morpholine ring is bonded directly to the carbocyclic ring.
  
[List of Patents for class 544 subclass 167]    167Nitro bonded directly to the carbocyclic ring
 This subclass is indented under subclass 165.  Compounds wherein the -NO2 group is bonded directly to the carbocyclic ring.
  
[List of Patents for class 544 subclass 168]    168Oxygen double bonded and acyclic nitrogen bonded directly to the same carbon
 This subclass is indented under subclass 162.  Compounds which contain a carbon atom to which acyclic nitrogen is bonded directly and to which oxygen is attached directly by a double bond.
(1) Note. This subclass provides for, interalia, carboxylic acid amides such as:

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[List of Patents for class 544 subclass 169]    169A ring bonded directly to the carbon
 This subclass is indented under subclass 168.  Compounds in which the carbon atom is bonded directly to a ring in addition to being bonded to acyclic nitrogen and double bonded to oxygen.
  
[List of Patents for class 544 subclass 170]    170Oxygen attched directly or indirectly to morpholine ring by nonionic bonding
 This subclass is indented under subclass 106.  Compounds wherein oxygen is attached directly or indirectly to the morpholine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 171]    171The oxygen is in a -COO- group
 This subclass is indented under subclass 170.  Compounds in which the oxygen is part of a O - group.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 172]    172Carbonyl of -COO- group bonded directly to a ring
 This subclass is indented under subclass 171.  Compounds wherein the carbon of the O - group is bonded directly to a ring.
  
[List of Patents for class 544 subclass 173]    173The oxygen is bonded directly to a ring
 This subclass is indented under subclass 170.  Compounds wherein oxygen is bonded directly to a ring.
  
[List of Patents for class 544 subclass 174]    174Ether containing
 This subclass is indented under subclass 173.  Compounds having the formula ROR", wherein R and R" are organic radicals, at least one of which is a ring.
  
[List of Patents for class 544 subclass 175]    175The oxygen is in a carbonyl group
 This subclass is indented under subclass 170.  Compounds wherein the oxygen is double bonded directly to acyclic carbon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

173+,for oxygen bonded directly to a ring carbon.
  
[List of Patents for class 544 subclass 176]    176The carbonyl is bonded directly to nitrogen of morpholine ring
 This subclass is indented under subclass 175.  Compounds wherein the acyclic carbon of the carbonyl group is bonded directly to the nitrogen of the morpholine ring.
  
[List of Patents for class 544 subclass 177]    177Ether containing
 This subclass is indented under subclass 170.  Compounds having the formula ROR", wherein R and R" are organic radicals, one which contains the morpholine ring.
  
[List of Patents for class 544 subclass 178]    178N-hydrocarbyl morpholines
 This subclass is indented under subclass 106.  Compounds in which a hydrocarbon substituent is bonded directly to the nitrogen of the morpholine ring.
(1) Note. Example of compounds provided for herein are:

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[List of Patents for class 544 subclass 179]    179Tetrazines
 This subclass is indented under subclass 1.  Compounds in which the six-membered hetero ring consists of four ring nitrogens and two ring carbons.
  
[List of Patents for class 544 subclass 180]    180Triazines
 This subclass is indented under subclass 1.  Compounds wherein the six-membered hetero ring consists of three ring nitrogens and three ring carbons.
(1) Note. This subclass contains, for example:

and

and

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[List of Patents for class 544 subclass 181]    181Heavy metal or aluminum containing
 This subclass is indented under subclass 180.  Compounds which contain aluminum or a metal having a specific gravity greater than 4.
(1) Note. Arsenic is considered a metal for the purposes of this subclass.
  
[List of Patents for class 544 subclass 182]    182Asymmetrical (e.g., 1, 2, 4-triazines, etc.)
 This subclass is indented under subclass 180.  Compounds in which two of the ring nitrogens of the six-membered hetero ring are bonded directly to each other.
(1) Note. Examples of compounds provided for herein are 1, 2, 3-triazine, often designated as vicinal triazine, and 1, 2, 4-triazine.
  
[List of Patents for class 544 subclass 183]    183Polycyclo ring system having the asymmetrical triazine ring as one of the cyclos
 This subclass is indented under subclass 182.  Compounds wherein the asymmetrical six-membered hetero ring is a cyclo in a polycyclo ring system.
(1) Note. Two examples of compounds provided for herein are illustrated below:

and

and

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[List of Patents for class 544 subclass 184]    184Four or more ring hetero atoms in the polycyclo ring system
 This subclass is indented under subclass 183.  Compounds wherein the polycyclo ring system contains a ring hetero atom in addition to the three ring nitrogens in the six-membered hetero ring.
(1) Note. Two examples of compounds provided for in this subclass are:

and

and

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[List of Patents for class 544 subclass 185]    185Hexamethylenetetramines
 This subclass is indented under subclass 180.  Compounds having the following basic structure and derivatives thereof wherein the hexamethylene tetramine ring system is not destroyed.

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[List of Patents for class 544 subclass 186]    186Processes
 This subclass is indented under subclass 185.  Processes in which hexamethylene tetramine or derivatives thereof are produced, separated from impurities or separated from the reaction mixture.
  
[List of Patents for class 544 subclass 187]    187Anthrone or anthraquinone containing
 This subclass is indented under subclass 180.  Compounds which contain anthrone or anthraquinone.
(1) Note. The anthrone or anthraquinone ring system may be three cyclos of a polycyclo ring system having more than three cyclos.
(2) Note. Two examples of compounds provided for herein are:

and

and

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[List of Patents for class 544 subclass 188]    188Polycyclo ring system having the anthrone or anthraquinone and at least one hetero ring as cyclos
 This subclass is indented under subclass 187.  Compounds wherein anthrone or anthraquinone is part of a polycyclo ring system which contains at least one hetero ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 189]    189Sulfur containing
 This subclass is indented under subclass 187.  Compounds which contain sulfur.
  
[List of Patents for class 544 subclass 190]    190Cyanuric chloride or dichloroisocyanuric acid salt
 This subclass is indented under subclass 180.  Compounds which are chlorinated derivatives of cyanuric or isocyanuric acid, and salts thereof.
(1) Note. Examples of compounds provided for herein are:

and

and

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[List of Patents for class 544 subclass 191]    191Processes utilizing cyanogen chloride reactant
 This subclass is indented under subclass 190.  Processes for the production of cyanuric chloride or a dichloro-iso-cyanuric acid salt which utilize cyanogen chloride as a (N = C- C1) reactant.
  
[List of Patents for class 544 subclass 192]    192Cyanuric acid per se or salt thereof
 This subclass is indented under subclass 180.  Compounds termed cyanuric acid, which exists in two forms as shown by the equilibrium.

‘normal’ cyanuric acid isocyanuric acidand salts thereof.

‘normal’ cyanuric acid isocyanuric acidand salts thereof.

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

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[List of Patents for class 544 subclass 193]    193Trimerization process to form the triazine ring
 This subclass is indented under subclass 180.  Processes wherein the six-membered hetero ring is formed by a trimerization reaction of a monomer.
(1) Note. This subclass provides for homotrimerization processes only. Compounds produced by reactions other than homopolymerizations are classified with the product.
(2) Note. Examples of monomers employed in the trimerization reaction are isocyanates and nitriles.
  
[List of Patents for class 544 subclass 193.1]    193.1Stilbene containing
 This subclass is indented under subclass 180.  Stilbene containing:Compounds which contains the group, illustrated below, wherein only hydrogen may be replaced.

Image 1 for class 544 subclass 193.1

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

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[List of Patents for class 544 subclass 193.2]    193.2Plural triazine rings containing:
 Compounds under subclss 193.1 which contain at least two triazine rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 194]    194Substituent nitrogen bonded directly to carbon of the triazine ring
 This subclass is indented under subclass 180.  Compounds wherein nitrogen, in addition to the three ring nitrogens, is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as:

and

and

Image 2 for class 544 subclass 194

(2) Note. Ammelide is provided for here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

182+,for all asmmetrical triazine rings, regardless of substitution.
  
[List of Patents for class 544 subclass 195]    195Phosphorus containing
 This subclass is indented under subclass 194.  Compounds which contain phosphorus.
  
[List of Patents for class 544 subclass 196]    196Three substituent nitrogens bonded directly to the three carbons of the triazine ring
 This subclass is indented under subclass 194.  Compounds wherein nitrogen, other than the three ring nitrogens, is bonded directly to each of the three ring carbons of the six-membered hetero ring.
(1) Note. This subclass contains, for example, substituted melamines.

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[List of Patents for class 544 subclass 197]    197Additional ring containing
 This subclass is indented under subclass 196.  Compounds in which there is a ring addition to the six-membered hetero ring.
(1) Note. Two examples of compounds provided for in this subclass are:

and

and

Image 2 for class 544 subclass 197

(2) Note. The azide ring below is frequently illustrated as -N3. It should be considered a nitrocyclic ring but not a hetero-cyclic ring.

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[List of Patents for class 544 subclass 198]    198Hetero ring
 This subclass is indented under subclass 197.  Compounds in which the additional ring is a hetero ring.
(1) Note. The additional hetero ring may be another triazine ring.
(2) Note. There must be at least four ring hetero atoms in the molecule to be classified here.
(3) Note. Examples of compounds provided for herein are:

Image 1 for class 544 subclass 198

and

and

Image 3 for class 544 subclass 198

(4) Note. Melem, melam and melon are provided for herein.
  
[List of Patents for class 544 subclass 199]    199Halogen or sulfur containing
 This subclass is indented under subclass 196.  Compounds which contain a halogen or sulfur.
  
[List of Patents for class 544 subclass 200]    200Melamine per se, or salt thereof
 This subclass is indented under subclass 196.  Compounds having the structure below or salts thereof.

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[List of Patents for class 544 subclass 201]    201Processes utilizing urea or biuret reactant
 This subclass is indented under subclass 200.  Processes wherein melamine is produced from urea or biuret.
  
[List of Patents for class 544 subclass 202]    202Processes utilizing cyanamide or dicyanamide reactant
 This subclass is indented under subclass 200.  Processes wherein melamine is produced from cyanamide or dicyanamide.
  
[List of Patents for class 544 subclass 203]    203Purification or recovery
 This subclass is indented under subclass 200.  Processes wherein melamine is separated from impurities or from the reaction mixture.
  
[List of Patents for class 544 subclass 204]    204Two substituent nitrogens bonded directly to two carbons of the triazine ring
 This subclass is indented under subclass 194.  Compounds wherein nitrogen, other than the three ring nitrogens, is bonded directly to two of the three ring carbons of the six-membered hetero ring.
(1) Note. This subclass contains, for example:

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[List of Patents for class 544 subclass 205]    205Guanamines
 This subclass is indented under subclass 204.  Compounds wherein hydrogen or carbon is bonded directly to the remaining ring carbon of the six-membered hetero ring.
(1) Note. Examples of compounds provided for in this subclass are:

and

and

formo-guanamine      acceto-guanamine

formo-guanamine acceto-guanamine

  
[List of Patents for class 544 subclass 206]    206Additional ring containing
 This subclass is indented under subclass 205.  Compounds which contain a ring in addition to the six-membered hetero ring.
(1) Note. This subclass provides for benzo-guanamine, for example:

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[List of Patents for class 544 subclass 207]    207Hetero ring
 This subclass is indented under subclass 206.  Compounds wherein the additional ring is a hetero ring.
(1) Note. This subclass contains, for example, diguanamines.
(2) Note. There must be at least four ring hetero atoms in the molecule to be classified here.
  
[List of Patents for class 544 subclass 208]    208Additional ring containing
 This subclass is indented under subclass 204.  Compounds which contain a ring in addition to the six-membered hetero ring.
(1) Note. Two examples of compounds provided for herein are:

and

and

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[List of Patents for class 544 subclass 209]    209Hetero ring
 This subclass is indented under subclass 208.  Compounds wherein the additional ring is a hetero ring.
(1) Note. The additional hetero ring may be another triazine ring.
(2) Note. There must be at least four ring hetero atoms in the molecule to be classified here.
  
[List of Patents for class 544 subclass 210]    210Sulfur containing
 This subclass is indented under subclass 204.  Compounds which contain sulfur.
  
[List of Patents for class 544 subclass 211]    211Additional ring containing
 This subclass is indented under subclass 194.  Compounds which contain a ring in addition to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 212]    212Hetero ring
 This subclass is indented under subclass 211.  Compounds in which the additional ring is a hetero ring.
(1) Note. There must be at least four ring hetero atoms in the molecule to be classified here.
  
[List of Patents for class 544 subclass 213]    213Sulfur containing
 This subclass is indented under subclass 194.  Compounds which contain sulfur.
  
[List of Patents for class 544 subclass 214]    214Phosphorus containing
 This subclass is indented under subclass 180.  Compounds which contain phosphorus.
  
[List of Patents for class 544 subclass 215]    215Chalcogen or halogen containing substituent
 This subclass is indented under subclass 180.  Compounds having a substituent containing chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or halogen bonded directly or indirectly to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 216]    216Bonded to triazine ring carbon
 This subclass is indented under subclass 215.  Compounds wherein the chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or halogen containing substituent is bonded to a ring carbon of the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as:

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[List of Patents for class 544 subclass 217]    217Halogen bonded directly to triazine ring carbon
 This subclass is indented under subclass 216.  Compounds wherein a halogen is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as:

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[List of Patents for class 544 subclass 218]    218Chalcogen bonded directly to triazine ring carbon
 This subclass is indented under subclass 217.  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 included herein is :

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[List of Patents for class 544 subclass 219]    219Chalcogen bonded directly to triazine ring carbon
 This subclass is indented under subclass 216.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as:

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[List of Patents for class 544 subclass 220]    220Divalent chalcogen double bonded directly to triazine ring carbon
 This subclass is indented under subclass 219.  Compounds wherein divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double 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 544 subclass 221]    221To three ring carbons
 This subclass is indented under subclass 220.  Compounds wherein divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to each of the ring carbons 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 544 subclass 222]    222Nitrogen containing substituent
 This subclass is indented under subclass 221.  Compounds which contain nitrogen in a substituent.
(1) Note. This subclass provides for compounds such as the two illustrated below:

and

and

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[List of Patents for class 544 subclass 223]    223To two ring carbons
 This subclass is indented under subclass 200.  Compounds wherein divalent chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to two of the ring carbons of the six-membered hetero ring.
(1) Note. This subclass provides for compounds such as the two illustrated below:

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[List of Patents for class 544 subclass 224]    224The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.):
 This subclass is indented under subclass 1.  Compounds in which the six-membered hetero ring consists of two ring nitrogens and four ring carbons.
  
[List of Patents for class 544 subclass 225]    225Heavy metal or aluminum containing:
 This subclass is indented under subclass 224.  Compounds which contain aluminum or a metal with a specific gravity greater than 4.
  
[List of Patents for class 544 subclass 226]    226Arsenic or zinc containing:
 This subclass is indented under subclass 225.  Compounds which contain arsenic or zinc.
  
[List of Patents for class 544 subclass 227]    227Mercury containing:
 This subclass is indented under subclass 225.  Compounds which contain mercury.
  
[List of Patents for class 544 subclass 228]    228Purine containing (including hydrogenated):
 This subclass is indented under subclass 227.  Compounds which contain a purine nucleus of the following basic structure in which the bonds between ring members may be single or double bonds.

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[List of Patents for class 544 subclass 229]    229Boron or silicon containing:
 This subclass is indented under subclass 224.  Compounds which contain boron or silicon.
  
[List of Patents for class 544 subclass 230]    230Spiro:
 This subclass is indented under subclass 224.  Compounds which contain a spiro ring system.
  
[List of Patents for class 544 subclass 231]    231Spiro diazine:
 This subclass is indented under subclass 230.  Compounds wherein at least one of the rings in the spiro ring system is a six-membered hetero ring consisting of two nitrogens and four carbons.
  
[List of Patents for class 544 subclass 232]    232Phosphorus attached directly or indirectly to a 1,2-diazine ring by nonionic bonding:
 This subclass is indented under subclass 224.  Compounds wherein phosphorus is attached directly or indirectly by nonionic bonding to the six-membered hetero ring which has the two ring nitrogens in the 1- and 2-positions.
  
[List of Patents for class 544 subclass 233]    233Polycyclo ring system having a 1,2-diazine ring as one of the cyclos:
 This subclass is indented under subclass 224.  Compounds wherein the six-membered hetero ring has the two ring nitrogens in the 1- and 2-positions and is a cyclo in a polycyclo ring system.
(1) Note. A diazine ring in a polycyclo ring system is numbered as if it were a single ring and not part of a ring system. Therefore, the diazine ring is considered 1,2-diazine in each of the following:

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[List of Patents for class 544 subclass 234]    234Tricyclo ring system having the 1,2-diazine ring as one of the cyclos:
 This subclass is indented under subclass 233.  Compounds wherein the polycyclo ring system consists of three rings.
  
[List of Patents for class 544 subclass 235]    235Bicyclo ring system having the 1,2-diazine ring as one of the cyclos:
 This subclass is indented under subclass 233.  Compounds wherein the polycyclo ring system consists of two rings.
  
[List of Patents for class 544 subclass 236]    236At least three ring nitrogens in the bicyclo ring system:
 This subclass is indented under subclass 235.  Compounds wherein the bicyclo ring system includes at least one ring nitrogen in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 237]    237Phthalazines (including hydrogenated):
 This subclass is indented under subclass 235.  Compounds wherein the bicyclo ring system has the following basic structure in which the bonds between ring members may be single or double bonds.:

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[List of Patents for class 544 subclass 238]    2381,2-diazines which contain an additional hetero ring:
 This subclass is indented under subclass 224.  Compounds wherein the six-membered hetero ring has the two ring nitrogens in the 1-and 2-positions and which contain an additional hetero ring.
  
[List of Patents for class 544 subclass 239]    239Chalcogen bonded directly to ring carbon of a 1,2-diazine ring:
 This subclass is indented under subclass 224.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring which has the two ring nitrogens in the 1- and 2-positions.
  
[List of Patents for class 544 subclass 240]    240Plural chalcogens bonded directly:
 This subclass is indented under subclass 239.  Compounds wherein at least two chalcogen atoms are 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 544 subclass 241]    241Halogen attached directly to the 1,2-diazine ring by nonionic bonding:
 This subclass is indented under subclass 239.  Compounds wherein halogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 242]    2421,3-diazines:
 This subclass is indented under subclass 224.  Compounds wherein the six-membered hetero ring has nitrogens in the 1- and 3-positions, and carbons in the remaining four positions.
(1) Note. The following shows the position numbering used for 1,3-diazines:

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[List of Patents for class 544 subclass 243]    243Phosphorus attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 242.  Compounds wherein phosphorus is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 244]    244Polycyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 243.  Compounds wherein the six-membered hetero ring is one of the cyclos in a polycyclo ring system.
  
[List of Patents for class 544 subclass 245]    245Polycyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 242.  Compounds wherein the six-membered hetero ring is one of the cyclos in a polycyclo ring system.
(1) Note. The positions of the six-membered hetero ring are numbered as if it were monocyclic when it is part of a polycyclo ring system.
  
[List of Patents for class 544 subclass 246]    246Tetracyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 245.  Compounds wherein the polycyclo ring system consists of four rings.
  
[List of Patents for class 544 subclass 247]    247Three or more ring hetero atoms in the tetracyclo ring system:
 This subclass is indented under subclass 246.  Compounds wherein the tetracyclo ring system includes at least one ring hetero atom in addition to the two ring nitrogens 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 544 subclass 248]    248Ring carbon is shared by three of the cyclos (e.g., anthrapyrimidine, etc.):
 This subclass is indented under subclass 246.  Compounds wherein three of the cyclos of the tetracyclo ring system have a ring carbon which is common to each of them.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 249]    249Tricyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 245.  Compounds wherein the polycyclo ring system consists of three rings.
  
[List of Patents for class 544 subclass 250]    250Three or more ring hetero atoms in the tricyclo ring system:
 This subclass is indented under subclass 249.  Compounds wherein the tricyclo ring system includes at least one ring hetero atom in addition to the two ring nitrogens 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 544 subclass 251]    251Four or more ring nitrogens in the tricyclo ring system:
 This subclass is indented under subclass 250.  Compounds wherein the tricyclo ring system includes at least two ring nitrogens in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 252]    252Ring nitrogen is shared by two of the cyclos:
 This subclass is indented under subclass 249.  Compounds in which a ring nitrogen is a member of two of the rings 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 544 subclass 253]    253Bicyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 245.  Compounds in which the polycyclo ring system consists of two rings.
  
[List of Patents for class 544 subclass 254]    254At least five ring hetero atoms in the bicyclo ring system:
 This subclass is indented under subclass 253.  Compounds wherein the bicyclo ring system includes at least three ring hetero atoms in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 255]    255Four ring hetero atoms in the bicyclo ring system:
 This subclass is indented under subclass 253.  Compounds wherein the bicyclo ring system includes two ring hetero atoms in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 256]    256Four ring nitrogens in the bicyclo ring system:
 This subclass is indented under subclass 255.  Compounds wherein the bicyclo ring system contains four ring nitrogens.
  
[List of Patents for class 544 subclass 257]    257Pterdines (including hydrogenated):
 This subclass is indented under subclass 256.  Compounds wherein the bicyclo ring system has the following basic structure in which the bonds between ring members may be single or double bonds.:

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(1) Note. The following shows the position numbering used for pteridines:

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[List of Patents for class 544 subclass 258]    258Nitrogen bonded directly to the pteridine ring system:
 This subclass is indented under subclass 257.  Compounds wherein nitrogen is bonded directly to the pteridine ring system.
  
[List of Patents for class 544 subclass 259]    259Plural nitrogens bonded directly to the pteridine ring system:
 This subclass is indented under subclass 258.  Compounds wherein two or more nitrogen atoms are bonded directly to the pteridine ring system.
  
[List of Patents for class 544 subclass 260]    260At 2- and 4-positions:
 This subclass is indented under subclass 259.  Compounds wherein nitrogen atoms are bonded directly to the 2- and 4-position carbons of the pteridine ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 261]    261Pteroyl per se or having -C(=X)-, wherein X is chalcogen, bonded directly to acyclic nitrogen of otherwise unsubstituted pteroyl:
 This subclass is indented under subclass 258.  Compounds which contain the structure, per se, wherein R is a radical; and derivatives thereof wherein one or more of the hydrogens attached to the acyclic nitrogens shown in the structure is replaced by , in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), and no other substitution is made in the structure shown.

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(1) Note. Examples of compounds provided for herein are:

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258,for hydropteroyl derivatives.
  
[List of Patents for class 544 subclass 262]    262The other cyclo in the bicyclo ring system is five-membered:
 This subclass is indented under subclass 256.  Compounds wherein a five-membered ring is the other cyclo of the bicyclo ring system.
  
[List of Patents for class 544 subclass 263]    263Ring nitrogen is shared by the two cyclos:
 This subclass is indented under subclass 262.  Compounds in which a ring nitrogen is a member of both of the rings in the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 264]    264Purines (including hydrogenated):
 This subclass is indented under subclass 262.  Compounds wherein the bicyclo ring system has the following basic structure, in which the bonds between ring members may be single or double bonds:

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[List of Patents for class 544 subclass 265]    265Chalcogen bonded directly to ring carbon of the purine ring system:
 This subclass is indented under subclass 264.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the purine ring system.
  
[List of Patents for class 544 subclass 266]    266At 2-, 6-, and 8-positions:
 This subclass is indented under subclass 265.  Compounds wherein chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the 2-, 6-, and 8-positions of the purine ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 267]    267At 2- and 6- positions (e.g., theophyllines etc.):
 This subclass is indented under subclass 265.  Compounds wherein chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the 2- and 6- positions of the purine ring system.
  
[List of Patents for class 544 subclass 268]    268Additional polycyclo ring system, which is not another purine, having a hetero ring as one of the cyclos:
 This subclass is indented under subclass 267.  Compounds which contain a nonpurine polycyclo ring system, having a hetero ring as one of the cyclos, in addition to the purine ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 269]    269Additional hetero ring which is unsaturated and is not one of the cyclos of a purine ring system:
 This subclass is indented under subclass 267.  Compounds having, in addition to the purine ring system, a hetero ring which has at least one double bond between ring members.
(1) Note. The additional hetero ring may not be a cyclo in any additional purine ring system.
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 270]    270Plural ring nitrogens in the additional hetero ring:
 This subclass is indented under subclass 269.  Compounds wherein the additional hetero ring contains at least two ring nitrogens.
  
[List of Patents for class 544 subclass 271]    271Having -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the purine ring system by nonionic bonding or halogen bonded directly at 8-position (e.g., theophylline acetate, 8-chlorotheophylline, etc.):
 This subclass is indented under subclass 267.  Compounds wherein either a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached directly or indirectly to the purine ring system by nonionic bonding, or a halogen is bonded directly to the 8-position of the purine ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 272]    272Nitrogen attached directly or indirectly to the purine ring system by nonionic bonding:
 This subclass is indented under subclass 267.  Compounds wherein nitrogen is attached directly or indirectly to the purine ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 273]    273Positions other than 2- and 6- are unsubstituted or hydrocarbyl substituted only (e.g., theophylline, etc.):
 This subclass is indented under subclass 267.  Compounds wherein the purine ring system, at positions other than 2- and 6-, is unsubstituted or substituted by hydrocarbon radicals only.
  
[List of Patents for class 544 subclass 274]    274Caffeine per se, theobromine per se, or salt thereof:
 This subclass is indented under subclass 273.  Compounds which have one of the following structures or salts thereof.

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[List of Patents for class 544 subclass 275]    275Recovery from natural or waste materials:
 This subclass is indented under subclass 274.  Compounds wherein caffeine, theobromine, or a salt thereof, is separated from impurities or from a reaction mixture.
  
[List of Patents for class 544 subclass 276]    276Nitrogen attached directly or indirectly to the purine ring system by nonionic bonding:
 This subclass is indented under subclass 265.  Compounds wherein nitrogen is attached directly or indirectly to the purine ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 277]    277Nitrogen attached directly or indirectly to the purine ring system by nonionic bonding:
 This subclass is indented under subclass 264.  Compounds wherein nitrogen is attached directly or indirectly to the purine ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 278]    278Three ring hetero atoms in the bicyclo ring system:
 This subclass is indented under subclass 253.  Compounds wherein the bicyclo ring system includes a ring hetero atom in addition to the two ring nitrogens 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 544 subclass 279]    279Three ring nitrogens in the bicyclo ring system:
 This subclass is indented under subclass 278.  Compounds wherein the bicyclo ring system contains three ring nitrogens.
  
[List of Patents for class 544 subclass 280]    280The other cyclo in the bicyclo ring system is five-membered:
 This subclass is indented under subclass 279.  Compounds wherein a five-membered ring is the other cyclo of the bicyclo ring system.
  
[List of Patents for class 544 subclass 281]    281Ring nitrogen is shared by the two cyclos:
 This subclass is indented under subclass 280.  Compounds in which a ring nitrogen is a member of both of the rings in the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 282]    282Ring nitrogen is shared by the two cyclos:
 This subclass is indented under subclass 253.  Compounds in which a ring nitrogen is a member of both of the rings in the bicyclo ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 283]    283The other cyclo in the bicyclo ring system is a benzene ring (e.g., quinazoline, etc.):
 This subclass is indented under subclass 253.  Compounds wherein the bicyclo ring system consists of a benzene ring and the six-membered hetero ring.
(1) Note. The following structure shows the numbering system for the ring members. The bonding between ring members of the hetero ring may be double or single but the other ring must be benzene.

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253,for "benzopyrimidine" derivatives in which one or more of the double bonds in the "benzo portion" is or are hydrogenated.
  
[List of Patents for class 544 subclass 284]    284Additional unsaturated hetero ring having at least nitrogen as a ring hetero atom:
 This subclass is indented under subclass 283.  Compounds having, in addition to the bicyclo ring system, a hetero ring which has at least one double bond between ring members and at least one ring nitrogen.
  
[List of Patents for class 544 subclass 285]    285Chalcogen bonded directly at 2- and 4- positions:
 This subclass is indented under subclass 283.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly at the 2- and 4- positions of the bicyclo ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 286]    286Chalcogen bonded directly at 2-position:
 This subclass is indented under subclass 283.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly at the 2-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 287]    287Chalcogen bonded directly at 4-position:
 This subclass is indented under subclass 283.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly at the 4-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 288]    288Sulfur bonded directly at 6- position:
 This subclass is indented under subclass 287.  Compounds wherein sulfur is bonded directly at the 6-position 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 544 subclass 289]    289Carbocyclic ring bonded directly at 2-position:
 This subclass is indented under subclass 287.  Compounds wherein a carbocyclic ring is bonded directly at the 2-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 290]    290Carbocyclic ring bonded directly at 3-position:
 This subclass is indented under subclass 287.  Compounds wherein a carbocyclic ring is bonded directly at the 3-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 291]    291Nitrogen bonded directly at 2- and 4- positions:
 This subclass is indented under subclass 283.  Compounds wherein nitrogens are bonded directly at the 2- and 4-positions of the bicyclo ring system.
  
[List of Patents for class 544 subclass 292]    292Nitrogen bonded directly at 2-position:
 This subclass is indented under subclass 283.  Compounds wherein nitrogen is bonded directly at the 2-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 293]    293Nitrogen bonded directly at 4-position:
 This subclass is indented under subclass 283.  Compounds wherein nitrogen is bonded directly at the 4-position of the bicyclo ring system.
  
[List of Patents for class 544 subclass 294]    294Polycyclo-carbocyclic ring system having at least three cyclos:
 This subclass is indented under subclass 242.  Compounds having a polycyclo ring system which contains at least three carbocyclic rings.
  
[List of Patents for class 544 subclass 295]    295Plural diazine rings:
 This subclass is indented under subclass 242.  Compounds which contain at least two of the six-membered hetero rings, each having ring nitrogens in the 1- and 4-positions, and carbons in the remaining four positions.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 296]    296Plural 1, 3-diazine rings:
 This subclass is indented under subclass 295.  Compounds which contain at least two of the six-membered hetero rings, each having its nitrogens in the 1- and 3- positions, and carbons in the remaining four positions.
  
[List of Patents for class 544 subclass 297]    297Nitrogen attached directly at 2-position by nonionic bonding and sulfur bonded directly to the nitrogen:
 This subclass is indented under subclass 242.  Compounds which include nitrogen attached directly at the 2-position of the six-membered hetero ring by nonionic bonding and sulfur bonded directly to the nitrogen which is at the 2-position.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 298]    298Chalcogen bonded directly to diazine ring carbon:
 This subclass is indented under subclass 242.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 299]    299At 2-, 4-, and 6-positions (e.g., barbituric acid, etc.):
 This subclass is indented under subclass 298.  Compounds wherein chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly at the 2-, 4-, and 6-positions of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 300]    300Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 299.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 301]    301Nitrogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 299.  Compounds wherein nitrogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 302]    302Additional chalcogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 299.  Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 303]    303Halogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 299.  Compounds wherein halogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 304]    304Alicyclic ring attached directly or indirectly to the diaziane ring by nonionic bonding:
 This subclass is indented under subclass 299.  Compounds wherein an alicyclic ring is attached directly or 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 544 subclass 305]    305Phenyl bonded directly at 5-position:
 This subclass is indented under subclass 299.  Compounds wherein a univalent radical derived from benzene by removal of one hydrogen is bonded directly at the 5-position of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 306]    306Acyclic ethylenic or acetylenic unsaturation containing:
 This subclass is indented under subclass 299.  Compounds which contain ethylenic or acetylenic unsaturation which is not between ring members of a ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 307]    307Plural alkyl groups bonded directly at 5-position:
 This subclass is indented under subclass 299.  Compounds wherein at least two alkyl groups are bonded directly to the 5-position of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 308]    308Plural diverse alkly groups bonded directly at 5-position:
 This subclass is indented under subclass 307.  Compounds wherein at least two different alkyl groups are bonded directly to the 5-position 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 544 subclass 309]    309At 2-position and a 4- or 6-position:
 This subclass is indented under subclass 298.  Compounds wherein chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the 2-position and to the 4- or 6-position of the six-membered hetero ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 310]    310Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 309.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 311]    311Nitrogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 309.  Compounds wherein nitrogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 312]    3125-position is unsubstituted or alkyl substituted only:
 This subclass is indented under subclass 311.  Compounds wherein the 5-position of the six-membered hetero ring is unsubstituted or substituted by alkyl radicals only.
  
[List of Patents for class 544 subclass 313]    313Halogen attached directly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 309.  Compounds wherein halogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 314]    314Additional chalcogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 309.  Compounds wherein an additional chalcogen, (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 315]    315At 2-position:
 This subclass is indented under subclass 298.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly at the 2-position of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 316]    316Nitrogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 315.  Compounds wherein nitrogen is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 317]    317The nitrogen is bonded directly at 4- or 6- position:
 This subclass is indented under subclass 316.  Compounds wherein the nitrogen is bonded directly to the 4- or 6- position 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 544 subclass 318]    318Additional chalcogen attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 315.  Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 319]    319At 4- or 6-position:
 This subclass is indented under subclass 298.  Compounds wherein the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly at the 4- or 6-position of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 320]    320Nitrogen attached directly at 2-position by nonionic bonding:
 This subclass is indented under subclass 319.  Compounds wherein nitrogen is attached directly to the 2-position of the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 321]    321Carbocyclic ring containing:
 This subclass is indented under subclass 320.  Compounds which contain a carbocyclic ring.
  
[List of Patents for class 544 subclass 322]    322Nitrogen attached directly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 242.  Compounds wherein nitrogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 323]    323At 2-position and at 4- or 6-position:
 This subclass is indented under subclass 322.  Compounds wherein the nitrogen is attached directly to the 2- and 4-position carbons of the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 324]    324Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 323.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 325]    325Substituent on 5-position contains carbocyclic ring:
 This subclass is indented under subclass 323.  Compounds wherein a substituent which contains a carbocyclic ring is attached to the 5-position carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 326]    326At 4- or 6-position:
 This subclass is indented under subclass 322.  Compounds wherein the nitrogen is attached directly to the 4- or 6-position carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 327]    327Sulfur attached indirectly to the diazine ring by nonionic bonding (e.g., thiamines, etc.):
 This subclass is indented under subclass 326.  Compounds wherein sulfur is attached indirectly to the diazine ring by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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SEE OR SEARCH THIS CLASS, SUBCLASS:

243,for thiamine derivatives having phosphorus substituents.
296,for thiamine derivatives having two or more pyrimidine rings.
  
[List of Patents for class 544 subclass 328]    328Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 326.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 329]    329Carbonyl attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 326.  Compounds wherein a group is attached directly or indirectly to the diazine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 330]    330At 2-position:
 This subclass is indented under subclass 322.  Compounds wherein the nitrogen is attached directly to the 2-position carbon of the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 331]    331Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 330.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 332]    332Chalcogen attached indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 330.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 333]    333Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 242.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 334]    334Halogen attached directly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 242.  Compounds wherein halogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 335]    335Chalcogen attached indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 242.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 336]    3361,4-diazines:
 This subclass is indented under subclass 224.  Compounds wherein the six-membered hetero ring has nitrogens in the 1-and 4-positions, and carbons in the remaining four positions.
  
[List of Patents for class 544 subclass 337]    337Phosphorus attached directly or indirectly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 336.  Compounds wherein phosphorus is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 338]    338Polycyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 336.  Compounds wherein the six-membered hetero ring is one of the cyclos in a polycyclo ring system.
(1) Note. The positions of the six-membered hetero ring, even when it is part of a polycyclo ring system, are numbered as if it were a single ring.
  
[List of Patents for class 544 subclass 339]    339Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.):
 This subclass is indented under subclass 338.  Compounds wherein the polycyclo ring system consists of seven rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 340]    340Chalcogen attached indirectly to the heptacyclo ring system by nonionic bonding:
 This subclass is indented under subclass 339.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the heptacyclo ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 341]    341Halogen, nitrogen, or carbon attached directly to the heptacyclo ring system by nonionic bonding:
 This subclass is indented under subclass 339.  Compounds wherein halogen, nitrogen, or carbon is attached directly to the heptacyclo ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 342]    342Pentacyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 338.  Compounds wherein the polycyclo ring system consists of five rings.
  
[List of Patents for class 544 subclass 343]    343Tetracyclo ring system having the diazine ring as one of the cyclos (e.g., benzophenazines, etc.):
 This subclass is indented under subclass 338.  Compounds wherein the polycyclo ring system consists of four rings.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 344]    344Tricyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 33.  Compounds wherein the polycyclo ring system consists of three rings.
  
[List of Patents for class 544 subclass 345]    345Three or more ring hetero atoms in the tricyclo ring system:
 This subclass is indented under subclass 344.  Compounds wherein the tricyclo ring system includes at least one ring hetero atom in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 346]    346Ring nitrogen is shared by two of the cyclos (e.g., ergot, alkaloids, etc.):
 This subclass is indented under subclass 345.  Compounds in which a ring nitrogen is a member of two of the rings 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 544 subclass 347]    347Phenazines (including hydrogenated):
 This subclass is indented under subclass 344.  Compounds wherein the tricyclo ring system has the following basic structure in which the bonds between ring members may be single or double bonds..

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[List of Patents for class 544 subclass 348]    348Nitrogen attached directly to the phenazine ring system by nonionic bonding:
 This subclass is indented under subclass 347.  Compounds wherein nitrogen is attached directly to the phenazine ring system by nonionic bonding.
  
[List of Patents for class 544 subclass 349]    349Bicyclo ring system having the diazine ring as one of the cyclos:
 This subclass is indented under subclass 338.  Compounds in which the polycyclo ring system consists of two rings.
  
[List of Patents for class 544 subclass 350]    350Three or more ring hetero atoms in the bicyclo ring system:
 This subclass is indented under subclass 349.  Compounds wherein the bicyclo ring system includes at least one ring hetero atom in addition to the two ring nitrogens of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 351]    351Triethylene diamines:
 This subclass is indented under subclass 349.  Compounds wherein the bicyclo ring system has the following basic structure:

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

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[List of Patents for class 544 subclass 352]    352Process of forming, purifying, or recovering triethylene diamine per se, or salt thereof:
 This subclass is indented under subclass 351.  Compounds wherein triethylene diamine per se is formed by a chemical reaction or is separated from impurities or a reaction mixture.
  
[List of Patents for class 544 subclass 353]    353Quinoxalines (including hydrogenated):
 This subclass is indented under subclass 349.  Compounds wherein the bicyclo ring system has the following basic structure, illustrated below, in which the bonds between ring members may be single or double bonds.

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[List of Patents for class 544 subclass 354]    354Chalcogen bonded directly to diazine ring carbon:
 This subclass is indented under subclass 353.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 355]    355Having -C(=X)-, wherein X is chalcogen, bonded directly to diazine ring carbon:
 This subclass is indented under subclass 353.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to a ring carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 356]    356Halogen or nitrogen attached directly to diazine ring carbon by nonionic bonding:
 This subclass is indented under subclass 353.  Compounds wherein halogen or nitrogen is attached directly to a ring carbon of the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 357]    357Plural diazine rings:
 This subclass is indented under subclass 336.  Compounds which contain at least two of the six-membered hetero rings, each having ring nitrogens in the 1- and 4-positions, and carbons in the remaining four positions.
  
[List of Patents for class 544 subclass 358]    358Piperazines (i.e., fully hydrogenated 1,4-diazines):
 This subclass is indented under subclass 336.  Compounds wherein the six-membered hetero ring, having nitrogens in the 1- and 4-positions, has single bonds only between ring members, i.e., piperazines.
  
[List of Patents for class 544 subclass 359]    359Additional hetero ring containing:
 This subclass is indented under subclass 358.  Compounds which contain a hetero ring in addition to the piperazine ring.
  
[List of Patents for class 544 subclass 360]    360Six-membered ring consisting of one nitrogen and five carbons (e.g., pyridine, etc.):
 This subclass is indented under subclass 359.  Compounds wherein the additional hetero ring is a six-membered ring consisting of one ring nitrogen and five ring carbons.
  
[List of Patents for class 544 subclass 361]    361The additional six-membered hetero ring is one of the cyclos in a polycyclo ring system:
 This subclass is indented under subclass 360.  Compounds wherein the additional six-membered hetero ring is a cyclo of a polycyclo ring system.
  
[List of Patents for class 544 subclass 362]    362The additional six-membered hetero ring is one of the cyclos in a bicyclo ring system:
 This subclass is indented under subclass 361.  Compounds wherein the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 363]    363Quinoline or isoquinoline (including hydrogenated):
 This subclass is indented under subclass 362.  Compounds wherein the bicyclo ring system is characterized by having a six-membered carbocyclic ring ortho-fused to two carbons of the additional six-membered hetero ring.
  
[List of Patents for class 544 subclass 364]    364At least three hetero rings containing:
 This subclass is indented under subclass 360.  Compounds which contain a hetero ring in addition to the piperazine ring and the six-membered hetero ring consisting of one ring nitrogen and five ring carbons.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 365]    365Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the additional six-membered hetero ring (e.g., nicotinic acid, etc.):
 This subclass is indented under subclass 360.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), as bonded directly to a ring carbon of the additional six-membered hetero ring.
(1) Note. This subclass would also contain nicotinic acid addition salts of piperazines.
  
[List of Patents for class 544 subclass 366]    366Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen:
 This subclass is indented under subclass 359.  Compounds wherein the additional hetero ring is five-membered having two or more ring hetero atoms, at least one of which is nitrogen.
  
[List of Patents for class 544 subclass 367]    367Ring chalcogen in the five-membered hetero ring:
 This subclass is indented under subclass 366.  Compounds in which the five-membered hetero ring contains a ring chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) in addition to the ring nitrogen.
  
[List of Patents for class 544 subclass 368]    368The five-membered hetero ring is one of the cyclos in a polycyclo ring system:
 This subclass is indented under subclass 367.  Compounds wherein the five-membered hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 369]    3691,3-oxazole ring or 1,3-thiazole ring (including hydrogenated):
 This subclass is indented under subclass 367.  Compounds wherein the five-membered hetero ring has a ring oxygen or ring sulfur in the 1-position, a ring nitrogen in the 3-position, and ring carbons in the remaining three positions.
  
[List of Patents for class 544 subclass 370]    3701,3-diazole ring (including hydrogenated):
 This subclass is indented under subclass 366.  Compounds wherein the five-membered hetero ring has ring nitrogens in the 1- and 3-positions, and ring carbons in the remaining three positions.
  
[List of Patents for class 544 subclass 371]    3711,2-diazole ring (including hydrogenated):
 This subclass is indented under subclass 366.  Compounds wherein the five-membered hetero ring has ring nitrogens in the 1- and 2-positions, and ring carbons in the remaining three positions.
  
[List of Patents for class 544 subclass 372]    372Five-membered hetero ring consisting of one nitrogen and four carbons:
 This subclass is indented under subclass 359.  Compounds wherein the additional hetero ring is five-membered consisting of one ring nitrogen and four ring carbons.
  
[List of Patents for class 544 subclass 373]    373The five-membered hetero ring is one of the cyclos in a bicyclo ring system:
 This subclass is indented under subclass 372.  Compounds wherein the five-membered hetero ring is one of the cyclos of a bicyclo ring system.
  
[List of Patents for class 544 subclass 374]    374Ring chalcogen in the additional hetero ring:
 This subclass is indented under subclass 359.  Compounds having in addition to the piperazine ring, a hetero ring which includes a ring chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
  
[List of Patents for class 544 subclass 375]    375Polycyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 374.  Compounds wherein the additional hetero ring is one of the cyclos of a polycyclo ring system.
  
[List of Patents for class 544 subclass 376]    376Bicyclo ring system having the additional hetero ring as one of the cyclos:
 This subclass is indented under subclass 375.  Compounds wherein the polycyclo ring system consists of exactly two rings.
  
[List of Patents for class 544 subclass 377]    377Plural ring chalcogens in the bicyclo ring system:
 This subclass is indented under subclass 376.  Compounds wherein the bicyclo ring system contains at least two ring chalcogens.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 378]    378Plural ring chalcogens in the polycyclo ring system or the piperazine ring bonded directly to the polycyclo ring system:
 This subclass is indented under subclass 375.  Compounds wherein the polycyclo ring system contains at least two ring chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), or the polycyclo ring system is bonded directly to the piperazine ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 379]    379The additional hetero ring is five-membered and unsaturated (e.g., thienyl piperazines, etc.):
 This subclass is indented under subclass 374.  Compounds wherein the additional hetero ring is five-membered and has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 380]    380Polycyclo-carbocyclic ring system having at least three cyclos:
 This subclass is indented under subclass 358.  Compounds having a polycylco ring system which contains at least three carbocyclic rings.
  
[List of Patents for class 544 subclass 381]    381Piperazine ring bonded directly to the polycyclo-carbocyclic ring system:
 This subclass is indented under subclass 380.  Compounds wherein the polycyclo-carbocyclic ring system is bonded directly to the piperazine ring.
  
[List of Patents for class 544 subclass 382]    382Nitrogen attached directly to the piperazine ring by nonionic bonding:
 This subclass is indented under subclass 358.  Compounds wherein nitrogen is attached directly to the piperazine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 383]    383Chalcogen attached directly to piperazine ring nitrogen by nonionic bonding:
 This subclass is indented under subclass 358.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to a ring nitrogen of the piperazine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 384]    384Chalcogen bonded directly to piperazine ring carbon:
 This subclass is indented under subclass 358.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the piperazine ring.
  
[List of Patents for class 544 subclass 385]    385Plural chalcogens bonded directly to piperazine ring carbons:
 This subclass is indented under subclass 384.  Compounds wherein at least two chalcogen atoms (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the six-membered hetero ring.
  
[List of Patents for class 544 subclass 386]    386Having -C(=X)-, wherein X is chalcogen, bonded directly to the piperazine ring:
 This subclass is indented under subclass 358.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium. or tellurium), is bonded directly to the piperazine ring.
  
[List of Patents for class 544 subclass 387]    387Plural -C(=X)- groups bonded directly to the piperazine ring:
 This subclass is indented under subclass 386.  Compounds wherein at least two groups are bonded directly to the piperazine ring.
  
[List of Patents for class 544 subclass 388]    388Chalcogen or acyclic nitrogen bonded directly to at least one of the -C(=X)- groups:
 This subclass is indented under subclass 387.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), or acyclic nitrogen is bonded directly to at least one of the groups.
  
[List of Patents for class 544 subclass 389]    389The -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 386.  Compounds wherein the is part of a X - 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 544 subclass 390]    390Halogen or acyclic nitrogen bonded directly to the -C(=X)- group:
 This subclass is indented under subclass 386.  Compounds wherein halogen or acyclic nitrogen is bonded directly to the group.
  
[List of Patents for class 544 subclass 391]    391Carbocyclic ring containing:
 This subclass is indented under subclass 386.  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 544 subclass 392]    392Phenyl or napthyl bonded directly to ring nitrogen of the piperazine ring:
 This subclass is indented under subclass 358.  Compounds wherein a phenyl or napthyl group is bonded directly to a ring nitrogen of the piperazine ring.
  
[List of Patents for class 544 subclass 393]    393Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen:
 This subclass is indented under subclass 392.  Compounds which contain acyclic nitrogen bonded directly to a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).
  
[List of Patents for class 544 subclass 394]    394The other ring nitrogen has a substituent which includes chalcogen single bonded to acyclic carbon:
 This subclass is indented under subclass 392.  Compounds wherein the other ring nitrogen of the piperazine ring has a substituent which includes chalcogen (i.e., oxygen, sulfur, selenium or tellurium) singly bonded to an acyclic carbon, e.g., an alcohol or ether, etc.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 395]    395The other ring nitrogen is unsubstituted or alkyl substituted only, or salt thereof:
 This subclass is indented under subclass 392.  Compounds wherein the other ring nitrogen of the piperazine ring is unsubstituted or alkyl substituted only, or salts thereof.
  
[List of Patents for class 544 subclass 396]    396Plural carbocyclic rings bonded directly to the same acyclic carbon:
 This subclass is indented under subclass 358.  Compounds which contain at least two carbocyclic rings bonded directly to the same acyclic carbon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 397]    397Chalcogen bonded directly to the carbon:
 This subclass is indented under subclass 396.  Compounds which contain chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly to the acyclic carbon.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 398]    398Chalcogen attached indirectly to the piperazine ring by nonionic bonding:
 This subclass is indented under subclass 358.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the piperazine ring by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 544 subclass 399]    399The chalcogen, X is in a -C(=X)- group:
 This subclass is indented under subclass 398.  Compounds wherein the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in an acyclic group.
  
[List of Patents for class 544 subclass 400]    400Acyclic nitrogen bonded directly to the-C(=X)- group:
 This subclass is indented under subclass 399.  Compounds wherein acyclic nitrogen is bonded directly to the group.
  
[List of Patents for class 544 subclass 401]    401The chalcogen is single bonded to both acyclic carbon and hydrogen:
 This subclass is indented under subclass 398.  Compounds wherein the chalcogen is in a hydroxy group which is bonded directly to carbon.
  
[List of Patents for class 544 subclass 402]    402Nitrogen attached indirectly to the piperazine ring by nonionic bonding:
 This subclass is indented under subclass 358.  Compounds wherein nitrogen is attached indirectly to the piperazine ring by nonionic bonding.
  
[List of Patents for class 544 subclass 403]    403Carbocyclic ring containing:
 This subclass is indented under subclass 358.  Compounds which contain a carbocyclic ring.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 544 subclass 404]    404N-hydrocarbyl piperazines:
 This subclass is indented under subclass 358.  Compounds in which a hydrocarbon substituent is bonded directly to a ring nitrogen of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 405]    405Additional hetero ring which is unsaturated:
 This subclass is indented under subclass 336.  Compounds having, in addition to the six-membered hetero ring, a hetero ring which has at least one double bond between ring members.
  
[List of Patents for class 544 subclass 406]    406Having -C(=X)-, wherein X is chalcogen, bonded directly to the diazine ring:
 This subclass is indented under subclass 336.  Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the diazine ring.
  
[List of Patents for class 544 subclass 407]    407Nitrogen attached directly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 406.  Compounds wherein nitrogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 408]    408Chalcogen bonded directly to diazine ring carbon:
 This subclass is indented under subclass 336.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to a ring carbon of the six-membered hetero ring.
  
[List of Patents for class 544 subclass 409]    409Halogen attached directly to the diazine ring by nonionic bonding:
 This subclass is indented under subclass 336.  Compounds wherein halogen is attached directly to the six-membered hetero ring by nonionic bonding.
  
[List of Patents for class 544 subclass 410]    410Unsubstituted or hydrocarbyl substituted only, or salt thereof:
 This subclass is indented under subclass 336.  Compounds wherein the six-membered hetero ring is unsubstituted or is substituted only by radicals which consist of hydrogen and carbon, or salts thereof.
  

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