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Classification Resources
 

 [Search a list of Patent Appplications for class 552]   CLASS 552,ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES
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SUBCLASSES

[List of Patents for class 552 subclass 1]    1Azides
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , which contain the azide group.
(1) Note. The azide group has no single definite structure; it can be represented by different resonance forms, such as:

and

and

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(2) Note. For simplicity, the azide group shall be structurally depicted in the following definitions as:

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SEE OR SEARCH CLASS:

588Hazardous or Toxic Waste Destruction or Containment,   subclass 408 for the chemical destruction of organic hazardous or toxic waste containing nitrogen.
  
[List of Patents for class 552 subclass 2]    2With preservative or stabilizer
 This subclass is indented under subclass 1.  Products wherein the azide is mixed with a stabilizing or preserving agent, whose sole function is to prevent physical or chemical change.
  
[List of Patents for class 552 subclass 3]    3Phoshorus attached directly or indirectly to the azide group by nonionic bonding
 This subclass is indented under subclass 1.  Compounds wherein the azide group is attached directly or indirectly to phosphorus by nonionic bonding.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 4]    4Silicon, boron, aluminum or heavy metal containing
 This subclass is indented under subclass 1.  Compounds which contain silicon, boron, aluminum or heavy metal.
(1) Note. Heavy metals are those whose specific gravity is greater than 4.00.
(2) Note. Arsenic is considered as a metal.
  
[List of Patents for class 552 subclass 5]    5Chalcogen or nitrogen bonded directly to the azide group (e.g., sulfonyl azides, etc.)
 This subclass is indented under subclass 1.  Compounds wherein the azide group is bonded directly to nitrogen or to chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 6]    6Having -C(=X)-, wherein X is chalcogen, bonded directly to the azide group
 This subclass is indented under subclass 1.  Compounds wherein the azide group is bonded directly to -C(=X)-, in which X is 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 552 subclass 7]    7Chalcogen bonded directly to the -C(=X)- group
 This subclass is indented under subclass 6.  Compounds wherein the-C(=X)- group is also bonded directly to chalcogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 8]    8Benzene ring bonded directly to the azide group
 This subclass is indented under subclass 1.  Compounds wherein the azide group is bonded directly to a benzene ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 9]    9Cyclopentanohydrophenanthrene ring system containing
 This subclass is indented under subclass 1.  Compounds which contain the cyclopentanohydrophenanthrene ring system.
(1) Note. The cyclopentanohydrophenanthrene ring system is depicted by the following structure, in which at least one of the rings A, B and C is not a benzene ring:

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[List of Patents for class 552 subclass 10]    10Acyclic carbon bonded directly to the azide group
 This subclass is indented under subclass 1.  Compounds wherein the azide group is bonded directly to acyclic carbon.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 11]    11Nitrogen attached indirectly to the azide group by acyclic nonionic bonding (e.g., diazides, etc.)
 This subclass is indented under subclass 10.  Compounds wherein the azide group is attached indirectly to nitrogen by acyclic nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 12]    12Having -C(=X)-, wherein X is chalcogen, attached indirectly to the azide group by acyclic nonionic bonding
 This subclass is indented under subclass 11.  Compounds in which the azide group is attached indirectly to -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), by acyclic nonionic bonding.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 100]    100Acyclic carbon bonded directly to three benzene rings and to cyano (e.g., triphenylacetonitrile, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... wherein three benzene rings and a cyano group are bonded to the same acyclic carbon.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 101]    101Acyclic carbon bonded directly to three benzene rings or to two benzene rings and a cyclohexadienyl ring, which acyclic carbon may not be bonded to a fourth carbon (e.g., triphenylmethane dyestuffs, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , wherein either (a) three benzene rings or (b) two benzene rings and a cyclohexadienyl ring are bonded directly to the same acyclic carbon, which acyclic carbon may not be bonded to a fourth carbon.
(1) Note. The triarylmethane dyestuffs are included within this subclass and its indents.
(2) Note. To be classified in this subclass, a compound must contain carbon, hydrogen, and at least one additional element; hydrocarbon triarylmethanes are classified in Class 585.
(3) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 102]    102With preservative or stabilizer
 This subclass is indented under subclass 101.  Products , wherein the compound is mixed with a stabilizing or preserving agent, whose sole function is to prevent physical or chemical change.
  
[List of Patents for class 552 subclass 103]    103Heavy metal or alumium containing
 This subclass is indented under subclass 101.  Compounds which contain aluminum or heavy metal.
(1) Note. Heavy metals are those whose specific gravity is greater than 4.00.
(2) Note. Arsenic is considered as a metal.
  
[List of Patents for class 552 subclass 104]    104Nitrogen, sulfur, phosphorus, or peroxy attached directly to the acyclic carbon by nonionic bonding
 This subclass is indented under subclass 101.  Compounds wherein the acyclic carbon is attached directly to nitrogen, sulfur, phosphorus or peroxy by nonionic bonding.
  
[List of Patents for class 552 subclass 105]    105The acyclic carbon and an additional carbon are bonded directly to the same oxygen (ethers, esters, etc.)
 This subclass is indented under subclass 101.  Compounds wherein the same oxygen is bonded both to the acyclic carbon and to an additional carbon.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 106]    106One of the rings, or a polycyclo ring system containing one of the rings, is bonded directly to -N=C=O or to -C(=O)OH (wherein H may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium)
 This subclass is indented under subclass 101.  Compounds wherein-N=C=O or -C(=O)OH, in which H may be replaced by Group IA or IIA light metal or by substituted or unsubstituted ammonium, is bonded directly to one of the rings or to a polycyclo ring system containing one of the rings.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 107]    107Chalcogen bonded directly to the ring or ring system (e.g., salicyclic type, hydroxynaphthoic type, etc.)
 This subclass is indented under subclass 106.  Compounds in which the ring, or the polycyclo ring system containing the ring, is further bonded directly to 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 552 subclass 108]    108One of the rings is part of a polycyclo ring system (e.g., naphthyldiphenylcarbinol, etc.)
 This subclass is indented under subclass 101.  Compounds wherein a polycyclo ring system is 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 552 subclass 109]    109An acyclic alkylene group is bonded directly to nitrogen and to chalcogen, cyano, carbonyl or additional nitrogen (e.g., N-hydroxyalkyl, N cyanoalkyl, N-sulfatoalkyl, aminoalkylamino groups, etc.)
 This subclass is indented under subclass 101.  Compounds wherein (a) nitrogen and (b) cyano, carbonyl, additional nitrogen, or chalcogen (i.e., oxygen, sulfur, selenium or tellurium) are bonded to the same acyclic alkylene group.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 110]    110One of the rings and a benzene ring are bonded directly to the same nitrogen (e.g., triphenylrosaniline, etc.)
 This subclass is indented under subclass 101.  Compounds , wherein the same nitrogen is bonded to one of the rings and to a benzene ring.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 111]    111Nitrogen, except as cyano, attached indirectly to a ring by acyclic nonionic bonding (e.g., benzyl rosanilines, etc.)
 This subclass is indented under subclass 101.  Compounds wherein a ring is attached to nitrogen, except as cyano, by acyclic nonionic bonding.
(1) Note. The compound may contain a cynao group, provided that an additional nitrogen is present which will satisfy the requirement of this subclass.
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 112]    112Carbon bonded directly to -S(=O)(=O)OH (wherein H may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium; i.e., sulfonic acids and salts thereof)
 This subclass is indented under subclass 101.  Compounds wherein-S(=O)(=O)OH, in which H may be replaced by a Group IA or IIA light metal or by substituted or unsubstituted ammonium, is bonded directly to carbon.
  
[List of Patents for class 552 subclass 113]    113Nitrogen bonded directly to one of the rings (e.g., malachite green, rosophenoline, etc.)
 This subclass is indented under subclass 101.  Compounds wherein one of the rings is bonded directly to nitrogen.
  
[List of Patents for class 552 subclass 114]    114Nitrogen bonded directly to each of the rings (e.g., rosaniline, crystal violet, etc.)
 This subclass is indented under subclass 113.  Compounds wherein each of the rings is bonded directly to nitrogen.
  
[List of Patents for class 552 subclass 115]    115Chalcogen bonded directly to one of the rings (e.g., fuchsone, etc.)
 This subclass is indented under subclass 101.  Compounds wherein one of the rings is bonded directly to chalcogen (i.e., oxygen, sulfur, selenium or tellurium).
  
[List of Patents for class 552 subclass 200]    200Tetracyclo naphthacene configured ring system having at least one double bond between ring members and having oxygen bonded directly to a carbon of an interior ring which carbon is a member of one ring only
 This subclass is indented under subclass 1.  Compounds under Class 532, ... having the tetracyclo naphthacene ring configuration with at least one double bond between ring members and having oxygen bonded directly to a carbon of an interior ring, of the ring system, which carbon is a member of one ring only.
(1) Note. The tetracyclo naphthacene configured ring is numbered as follows, for this subclass and its indents:

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(2) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 201]    201Two oxygens double bonded directly to the interior ring in para positions
 This subclass is indented under subclass 200.  Compounds wherein the interior ring, of the tetracyclo naphthacene configured ring system, has two oxygens double bonded directly thereto in para positions.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 202]    202At least six oxygens bonded directly to the tetracyclo ring system
 This subclass is indented under subclass 200.  Compounds wherein the tetracyclo naphthacene configured ring system has at least six oxygens bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 203]    203Nitrogen and carbonyl or cyano bonded directly to the tetracyclo ring system (e.g., tetracycline, etc.)
 This subclass is indented under subclass 202.  Compounds wherein the tetracyclo ring system has nitrogen and either the cyano or carboxyl group bonded directly to the same ring, e.g., tetracycline, etc.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 204]    204Carbon double bonded directly to the tetracyclo ring system (e.g., 6 methylene tetracycline, etc.)
 This subclass is indented under subclass 203.  Compounds which additionally have carbon double bonded directly to the tetracyclo ring system, e.g., 6-methylene tetracycline, etc.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 205]    205Plural nitrogens bonded directly to the tetracyclo ring system
 This subclass is indented under subclass 203.  Compounds wherein the tetracyclo ring system has plural nitrogens bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 206]    206Processes
 This subclass is indented under subclass 203.  Processes of preparing, purifying or recovering the tetracyclo ring system compounds which have nitrogen and cyano or carbonyl bonded directly to them.
  
[List of Patents for class 552 subclass 207]    207Heavy metal or aluminum containing material utilized
 This subclass is indented under subclass 206.  Processes in which an aluminum or heavy metal containing material is utilized.
  
[List of Patents for class 552 subclass 208]    208Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- and 10-positions (e.g., anthraquinones, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , having a polycyclo ring system which is or contains the anthracene ring configuration with at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly to the ring system at the 9- and 10- positions.
(1) Note. For this and indented subclasses, the anthracene-configured ring is numbered as follows:

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(2) Note. For this and indented subclasses, the anthraquinone, other than those provided for in this class (552), subclasses 268 through 270.
(3) Note. This subclass contains processes of purification and separation of anthraquinone, per se.
(4) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 209]    209Phosphorus, selenium, silicon, heavy metal or aluminum containing
 This subclass is indented under subclass 208.  Compounds which contain phosphorus, selenium, silicon, heavy metal or aluminum.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 210]    210Nitrogen or carbon double bonded directly at the 9- or 10-position
 This subclass is indented under subclass 208.  Compounds wherein nitrogen or carbon is double bonded directly at the 9- or 10- position of the ring system.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 211]    211Sulfur bonded directly to oxygen which is single bonded directly at the 9- or 10-position
 This subclass is indented under subclass 208.  Compounds wherein sulfur is bonded directly to the oxygen which is single bonded directly to the 9- or 10- position of the ring system.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 212]    212The polycyclo ring system is bonded directly to an additional polycyclo ring system having at least three cyclos (e.g., plural anthracene configured ring systems bonded directly to each other, etc.)
 This subclass is indented under subclass 208.  Compounds wherein the polycyclo ring system is bonded directly to an additional polycyclo ring system which has at least three cyclos.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 213]    213The polycyclo ring system and an additional polycyclo ring system having at least three cyclos are bonded directly to the same atom (e.g., plural anthracene configured ring systems bonded directly to the same sulfur, etc.)
 This subclass is indented under subclass 208.  Compounds wherein the polycyclo ring system and an additional polycyclo ring system which has at least three cyclos are bonded directly to the same atom.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 214]    214The atom is nitrogen (e.g., anthrimides, etc.)
 This subclass is indented under subclass 213.  Compounds wherein nitrogen is the atom.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 215]    215At least five cyclos in the polycyclo ring system
 This subclass is indented under subclass 214.  Compounds wherein the polycyclo ring system has at least five cyclos.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 216]    216The polycyclo ring system is tetracyclic
 This subclass is indented under subclass 214.  Compounds wherein the polycyclo ring system is tetracyclic, i.e., is composed of four rings.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 217]    217Nitrogen, oxygen, sulfur, carbon or halogen bonded directly at beta position of the anthracene configured ring system (i.e., 2-, 3-, 6- or 7 position)
 This subclass is indented under subclass 214.  Compounds wherein the anthracene configured ring system has halogen, sulfur, oxygen, nitrogen or additional carbon bonded directly to a beta position.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 218]    218The polycyclo ring system is attached indirectly by nonionic bonding to an additional polycyclo ring system having at least three cyclos (e.g., plural anthracene ring systems attached indirectly to each other by nonionic bonding, etc.)
 This subclass is indented under subclass 208.  Compounds wherein a polycyclo ring system having at least three cyclos is attached indirectly to the anthracene configured ring system by nonionic bonding.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 219]    219Nitrogen, oxygen, sulfur, carbon or halogen bonded directly at beta position of the anthracene configured ring system (i.e. 2-, 3-, 6- or 7 position)
 This subclass is indented under subclass 218.  Compounds wherein the anthracene configured ring system has halogen, sulfur, oxygen, nitrogen or additional carbon bonded directly at the beta position (i.e., 2-, 3-, 6- or 7- position).
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 220]    220The polycyclo ring system contains at least four cyclos
 This subclass is indented under subclass 208.  Compounds wherein the anthracene configured ring system is a part of a polycyclo ring system which has at least four cyclos.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 221]    221Sulfur bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 208.  Compounds wherein a beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene ring system has at least one sulfur bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 222]    222Nitrogen or additional sulfur bonded directly to the sulfur
 This subclass is indented under subclass 221.  Compounds wherein the sulfur has nitrogen or additional sulfur bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 223]    223Additional carbon bonded directly to the sulfur
 This subclass is indented under subclass 221.  Compounds wherein the sulfur has additional carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 224]    224Carbonyl, nitrogen, oxygen or halogen bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 221.  Compounds wherein a beta position (i.e., 2-, 3-, 6- or 7- position) of the anthracene configured ring system has halogen, oxygen, nitrogen or carbonyl bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 225]    225Nitrogen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 221.  Compounds wherein an alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has nitrogen bonded thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 226]    226Oxygen, sulfur or halogen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 225.  Compounds wherein an alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has halogen, sulfur or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 227]    227Plural nitrogens, plural oxygens, plural sulfurs, or plural halogens bonded directly at alpha positions
 This subclass is indented under subclass 226.  Compounds wherein at least two alpha positions (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system have the same atom bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 228]    228Additional ring containing
 This subclass is indented under subclass 225.  Compounds which contain at least one additional ring.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 229]    229Containing cyano or containing nitrogen bonded directly to sulfur (e.g., sulfonamide containing, etc.)
 This subclass is indented under subclass 228.  Compounds which contain cyano or contain nitrogen bonded directly to sulfur.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 230]    230Acyclic carbonyl or thiocarbonyl containing (e.g., thiocarboxamide containing, etc.)
 This subclass is indented under subclass 228.  Compounds which contain acyclic carbonyl or thiocarbonyl.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 231]    231Oxygen, sulfur or halogen bonded directly to the additional ring
 This subclass is indented under subclass 230.  Compounds wherein the additional ring has halogen, sulfur or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 232]    232Oxygen, sulfur, nitro or halogen bonded directly to the additional ring
 This subclass is indented under subclass 228.  Compounds wherein the additional ring has halogen, nitro, sulfur or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 233]    233Plural additional rings containing
 This subclass is indented under subclass 232.  Compounds which contain plural additional rings.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 234]    234Sulfur bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 208.  Compounds wherein an alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has sulfur bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 235]    235Nitrogen or halogen bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 234.  Compounds wherein the anthracene configured ring system has halogen or nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 236]    236Nitrogen bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 208.  Compounds wherein a beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene configured ring system has nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 237]    237Oxygen, nitrogen or additional carbon bonded directly to the nitrogen
 This subclass is indented under subclass 236.  Compounds wherein the nitrogen has an additional carbon, an additional nitrogen or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 238]    238Nitrogen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 208.  Compounds wherein an alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 239]    239Cyano bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 238.  Compounds wherein the anthracene configured ring system has cyano bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 240]    240Oxygen bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 238.  Compounds wherein a beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene ring system has oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 241]    241Additional carbon bonded directly to the oxygen
 This subclass is indented under subclass 240.  Compounds wherein the oxygen has an additional carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 242]    242The additional carbon is part of a ring
 This subclass is indented under subclass 241.  Compounds wherein the additional carbon is part of a ring.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 243]    243Oxygen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 238.  Compounds wherein oxygen is bonded directly to a remaining alpha position (i.e., 1-, 4-, 5- or 8- position) of the anthracene configured ring system.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 244]    244Halogen bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 243.  Compounds wherein the anthracene configured ring system has halogen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 245]    245Carbon bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 243.  Compounds wherein the anthracene configured ring system has carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 246]    246Oxygen bonded directly to the nitrogen (e.g., nitro bonded directly at 8 position, etc.)
 This subclass is indented under subclass 243.  Compounds wherein the nitrogen has oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 247]    247Additional carbon bonded directly to the nitrogen
 This subclass is indented under subclass 243.  Compounds wherein the nitrogen has additional carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

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[List of Patents for class 552 subclass 248]    248Cyano, carboxamide, sulfonamide or halogen containing
 This subclass is indented under subclass 247.  Compounds which contain halogen, sulfonamide, carboxamide or cyano.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 248

  
[List of Patents for class 552 subclass 249]    249Halogen bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 238.  Compounds wherein the anthracene configured ring system has halogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 249

  
[List of Patents for class 552 subclass 250]    250Carbonyl, oxygen or sulfur bonded directly to he nitrogen
 This subclass is indented under subclass 249.  Compounds wherein the nitrogen has sulfur, oxygen or carbonyl bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 250

  
[List of Patents for class 552 subclass 251]    251Carbon bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 238.  Compounds wherein the anthracene configured ring system has carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 251

  
[List of Patents for class 552 subclass 252]    252Nitrogen or halogen bonded directly to the carbon (e.g., carboxamide bonded directly to the anthracene configured ring system, etc.)
 This subclass is indented under subclass 251.  Compounds wherein the carbon has halogen or nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 252

  
[List of Patents for class 552 subclass 253]    253Oxygen or sulfur bonded directly to the nitrogen (e.g., 1- nitroanthraquinone, etc.)
 This subclass is indented under subclass 238.  Compounds wherein the nitrogen has sulfur or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 253

  
[List of Patents for class 552 subclass 254]    254Plural nitrogens bonded directly at alpha positions (i.e., 1-, 4-, 5- or 8 positions, e.g., 1, 5- dinitroanthraquinones, etc.)
 This subclass is indented under subclass 253.  Compounds wherein an additional nitrogen is bonded directly to a remaining alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 254

  
[List of Patents for class 552 subclass 255]    255Additional carbon bonded directly to the nitrogen
 This subclass is indented under subclass 238.  Compounds wherein the nitrogen has an additional carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 255

  
[List of Patents for class 552 subclass 256]    256The additional carbon is part of a carbonyl group (i.e., carboxamido bonded directly at alpha position)
 This subclass is indented under subclass 255.  Compounds wherein the additional carbon is part of a carbonyl group (i.e., -N - C-).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 256

  
[List of Patents for class 552 subclass 257]    257Nitrogen, oxygen, sulfur or halogen bonded directly to an additional ring
 This subclass is indented under subclass 256.  Compounds wherein halogen, sulfur, oxygen or nitrogen is bonded directly to an additional ring.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 257

  
[List of Patents for class 552 subclass 258]    258The additional carbon is part of a ring or ring system
 This subclass is indented under subclass 255.  Compounds wherein the additional carbon is part of a ring or a fused ring system.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 258

  
[List of Patents for class 552 subclass 259]    259Oxygen, sulfur or halogen bonded directly to the ring or ring system
 This subclass is indented under subclass 258.  Compounds wherein the ring or fused ring system has halogen, sulfur or oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 259

  
[List of Patents for class 552 subclass 260]    260Acyclic carbonyl, sulfur or halogen containing
 This subclass is indented under subclass 255.  Compounds which contain halogen, sulfur or acyclic carbonyl.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 260

  
[List of Patents for class 552 subclass 261]    261Oxygen bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene configured ring system has oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 261

  
[List of Patents for class 552 subclass 262]    262Oxygen bonded directly at alpha position (i.e., 1-, 4-, 5-, or 8-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has oxygen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 262

  
[List of Patents for class 552 subclass 263]    263Halogen bonded directly at beta position (i.e., 2-, 3-, 6-, or 7-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene configured ring system has halogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 263

  
[List of Patents for class 552 subclass 264]    264Halogen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has halogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 264

  
[List of Patents for class 552 subclass 265]    265Carbon bonded directly at beta position (i.e., 2-, 3-, 6- or 7-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one beta position (i.e., 2-, 3-, 6-, or 7- position) of the anthracene configured ring system has carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 265

  
[List of Patents for class 552 subclass 266]    266Nitrogen, halogen or additional oxygen containing
 This subclass is indented under subclass 265.  Compounds which contain halogen, nitrogen or additional oxygen.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 266

  
[List of Patents for class 552 subclass 267]    267Carbon bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position)
 This subclass is indented under subclass 208.  Compounds wherein at least one alpha position (i.e., 1-, 4-, 5-, or 8- position) of the anthracene configured ring system has carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 267

  
[List of Patents for class 552 subclass 268]    268Processes of forming anthraquinone per se or enolic form thereof by reacting an organic acid, aldehyde, anhydride or an indane (e.g., reacting phthalic anhydride, methyl phenylindane, etc.)
 This subclass is indented under subclass 208.  Processes of forming anthraquinone, per se, or an enolic form thereof by utilizing an organic acid, an aldehyde, an anhydride or an indane as one of the reactants.
  
[List of Patents for class 552 subclass 269]    269Processes of forming anthraquinone per se or enolic form thereof utilizing heavy metal containing material (e.g., vanadium catalyst utilized, etc.)
 This subclass is indented under subclass 208.  Processes wherein a heavy metal containing material is utilized to form anthraquinone, per se, or an enolic form thereof.
  
[List of Patents for class 552 subclass 270]    270Light metal or nitrogen containing material utilized (e.g., ceric ammonium nitrate catalyst utilized, etc.)
 This subclass is indented under subclass 269.  Processes wherein either a nitrogen containing material or a light metal containing material is utilized.
  
[List of Patents for class 552 subclass 271]    271Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded direct at the 9- or 10-position (e.g., anthrones, anthranois, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , having a polycyclo ring system which is or contains the anthracene configured ring system has at least one double bond between ring members and has oxygen single bonded or any atom double bonded directly at the 9- or 10- position of the ring system.
(1) Note. For this and indented subclasses, the anthracene configured ring system is numbered as follows:

Image 1 for class 552 subclass 271

(2) Note. This subclass contains, for example:

Image 2 for class 552 subclass 271

  
[List of Patents for class 552 subclass 272]    272Phosphorus, selenium, tellurium, or heavy metal containing
 This subclass is indented under subclass 271.  Compounds which contain heavy metal, tellurium, selenium, or phosphorus.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 272

  
[List of Patents for class 552 subclass 273]    273The polycyclo ring system is bonded directly to an additional polycyclo ring system having at least three cyclo (e.g., plural anthracene configured ring systems bonded directly to each other, etc.)
 This subclass is indented under subclass 271.  Compounds wherein the polycyclo ring system is bonded directly to an additional polycyclo ring system having at least three cyclos.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 273

  
[List of Patents for class 552 subclass 274]    274The polycyclo ring system is attached indirectly by nonionic bonding to an additional polycyclo ring system having a least three cyclos (e.g., plural anthracene configured ring systems bonded directly to the same nitrogen, etc.)
 This subclass is indented under subclass 271.  Compounds wherein the polycyclo ring system is attached by nonionic bonding indirectly to an additional polycyclo ring system which has at least three cyclos.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 274

  
[List of Patents for class 552 subclass 275]    275The polycyclo ring system has at least ten cyclos
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system is part of a polycyclo ring system which has at least ten cyclos.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 275

  
[List of Patents for class 552 subclass 276]    276The polycyclo ring system has nine cyclos
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system is part of a nonacyclo ring system, i.e., a ring system composed of exactly nine cycles.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 276

  
[List of Patents for class 552 subclass 277]    277Cyano, nitrogen or sulfur bonded directly to the nonacyclo ring system
 This subclass is indented under subclass 276.  Compounds wherein the nonacyclo ring system has sulfur, nitrogen or cyano bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 277

  
[List of Patents for class 552 subclass 278]    278Halogen containing or processes wherein a halogen containing material is utilized
 This subclass is indented under subclass 277.  Compounds which contain halogen or processes under subclass 277 wherein a halogen containing material is utilized.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 278

  
[List of Patents for class 552 subclass 279]    279Oxygen single bonded directly to the nonacyclo ring system
 This subclass is indented under subclass 276.  Compounds wherein the nonacyclo ring system has oxygen single bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 279

  
[List of Patents for class 552 subclass 280]    280Halogen or light metal containing or processes wherein a halogen or light metal containing is utilized
 This subclass is indented under subclass 279.  Compounds which contain halogen or light metal or processes under subclass 279 wherein a halogen or light metal material is utilized.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 280

  
[List of Patents for class 552 subclass 281]    281Halogen containing
 This subclass is indented under subclass 276.  Compounds which contain halogen.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 281

  
[List of Patents for class 552 subclass 282]    282The polycyclo ring system has seven or eight cyclos
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system is part of a ring system composed of seven or eight cycles.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 282

  
[List of Patents for class 552 subclass 283]    283Halogen containing
 This subclass is indented under subclass 282.  Compounds which contain halogen.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 283

  
[List of Patents for class 552 subclass 284]    284The polycyclo ring system has five of six cyclos
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system is part of a ring system composed of five or six cycles.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 284

  
[List of Patents for class 552 subclass 285]    285Halogen containing
 This subclass is indented under subclass 284.  Compounds which contain halogen.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 285

  
[List of Patents for class 552 subclass 286]    286The polycyclo ring system has four cyclos (e.g., benzanthrones, etc.)
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system is part of a ring system composed of four cyclos.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 286

  
[List of Patents for class 552 subclass 287]    287Cyano, carbonyl, nitrogen or sulfur bonded directly to the tetracyclo ring system
 This subclass is indented under subclass 286.  Compounds wherein the tetracyclo ring system has sulfur, nitrogen, carbonyl or cyano bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 287

  
[List of Patents for class 552 subclass 288]    288Halogen or carbon bonded directly to the tetracyclo ring system
 This subclass is indented under subclass 286.  Compounds wherein the tetracyclo ring system has carbon or halogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 288

  
[List of Patents for class 552 subclass 289]    289Nitrogen or sulfur bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system has sulfur or nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 289

  
[List of Patents for class 552 subclass 290]    290Carbon, halogen or plural oxygens bonded directly to the anthracene configured ring system
 This subclass is indented under subclass 271.  Compounds wherein the anthracene configured ring system has halogen, carbon or plural oxygens bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 290

  
[List of Patents for class 552 subclass 291]    291Cyclohexadiene having atoms double bonded directly at the 1- and 2- positions (e.g., orthoquinones, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , wherein atoms are double bonded directly to the 1- and 2- positions of a cyclohexadiene ring.
(1) Note. For this and indented subclasses, the cyclohexadiene ring is numbered as follows:

Image 1 for class 552 subclass 291

(2) Note. This subclass contains, for example:

Image 2 for class 552 subclass 291

  
[List of Patents for class 552 subclass 292]    292Polycyclo ring system having the cyclohexadiene as one of the cyclos
 This subclass is indented under subclass 291.  Compounds wherein the cyclohexadiene is one of the cyclos in a polycyclo ring system.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 292

  
[List of Patents for class 552 subclass 293]    293Cyclohexadiene having atoms double bonded directly at the 1- and 4- positions (e.g., paraquinones, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , wherein atoms are double bonded directly at the 1- and 4- positions of a cyclohexadiene ring.
(1) Note. For this and indented subclasses, the cyclohexadiene ring is numbered as follows:

Image 1 for class 552 subclass 293

(2) Note. This subclass contains, for example:

Image 2 for class 552 subclass 293

  
[List of Patents for class 552 subclass 294]    294Phosphorus, heavy metal or aluminum containing
 This subclass is indented under subclass 293.  Compounds which contain aluminum, heavy metal or phosphorus.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 294

  
[List of Patents for class 552 subclass 295]    295Polycyclo ring system having the cyclohexadiene as one of the cyclos
 This subclass is indented under subclass 293.  Compounds wherein the cyclohexadiene is part of a polycyclo ring system.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 295

  
[List of Patents for class 552 subclass 296]    296Oxygen double bonded directly at the 1- and 4- positions
 This subclass is indented under subclass 295.  Compounds wherein oxygen is double bonded directly at the 1- and 4- positions.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 296

  
[List of Patents for class 552 subclass 297]    297Nitrogen or halogen bonded directly to the polycyclo ring system
 This subclass is indented under subclass 296.  Compounds wherein the polycyclo ring system has halogen or nitrogen bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 297

  
[List of Patents for class 552 subclass 298]    298Chalcogen single bonded directly to the polycyclo ring system
 This subclass is indented under subclass 296.  Compounds wherein the polycyclo ring system has chalcogen (i.e., oxygen, sulfur, selenium or tellurium) single bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 298

  
[List of Patents for class 552 subclass 299]    299Carbon bonded directly to the polycyclo ring system
 This subclass is indented under subclass 296.  Compounds wherein the polycyclo ring system has carbon bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 299

  
[List of Patents for class 552 subclass 300]    300Plural oxygens and plural nitrogens bonded directly to the polycyclo ring system
 This subclass is indented under subclass 295.  Compounds wherein the polycyclo ring system has at least two oxygens and at least two nitrogens bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 300

  
[List of Patents for class 552 subclass 301]    301Nitrogen double bonded directly at the 1- and 4- positions
 This subclass is indented under subclass 293.  Compounds wherein the 1- and 4- positions of the cyclohexadiene have nitrogen double bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 301

  
[List of Patents for class 552 subclass 302]    302Nitrogen double bonded directly at the 1- or 4- positions
 This subclass is indented under subclass 293.  Compounds wherein the 1- or 4- position of the cyclohexadiene has nitrogen double bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 302

  
[List of Patents for class 552 subclass 303]    303Carbon double bonded directly at the 1- and 4- positions
 This subclass is indented under subclass 293.  Compounds wherein the 1- and 4- positions of the cyclohexadiene have carbon double bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 303

  
[List of Patents for class 552 subclass 304]    304Carbon double bonded directly at the 1- or 4- position
 This subclass is indented under subclass 293.  Compounds wherein the 1- or 4- position of the cyclohexadiene has carbon double bonded directly thereto.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 304

  
[List of Patents for class 552 subclass 305]    305Sulfur bonded directly at the 2-, 3-, 5- or 6- position
 This subclass is indented under subclass 293.  Compounds wherein sulfur is bonded directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 305

  
[List of Patents for class 552 subclass 306]    306Nitrogen bonded directly at the 2-, 3-, 5- or 6- position
 This subclass is indented under subclass 293.  Compounds wherein nitrogen is bonded directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 306

  
[List of Patents for class 552 subclass 307]    307Oxygen bonded directly at the 2-, 3-, 5-, or 6- position
 This subclass is indented under subclass 293.  Compounds wherein oxygen is bonded directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 307

  
[List of Patents for class 552 subclass 308]    308Halogen bonded directly at the 2-, 3-, 5-, or 6- position
 This subclass is indented under subclass 293.  Compounds wherein halogen is bonded directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 308

  
[List of Patents for class 552 subclass 309]    309Carbon donded directly at the 2-, 3-, 5- or 6- position
 This subclass is indented under subclass 293.  Compounds wherein carbon is bonded directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 309

  
[List of Patents for class 552 subclass 310]    310At least three carbons bonded directly to the cyclohexadiene
 This subclass is indented under subclass 309.  Compounds wherein at least three carbons are bonded directly to the cyclohexadiene ring.
(1) Note. This subclass contains, for example:

Image 1 for class 552 subclass 310

  
[List of Patents for class 552 subclass 500]    500Cyclopentanohydrophenanthrene ring system wherein two nonadjacent carbons of the ring system are bonded directly to each other (e.g., 3,5 cyclocholesterols, 3,5-cycloandrostanes, etc.)
 This subclass is indented under subclass 1.  Compounds under Class 532, ... , containing a cyclopentano-hydrophenanthrene ring system configuration wherein two nonadjacent carbons of the ring system are bonded directly to each other and which may contain double bonds between ring members.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 500

  
[List of Patents for class 552 subclass 501]    501Oxygen bonded directly at the 6-position of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 500.  Compounds wherein oxygen is bonded directly at the 6-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 501

  
[List of Patents for class 552 subclass 502]    502Cyclopentanohydrophenanthrene ring system containing
 This subclass is indented under subclass 1.  Compounds under Class 532, which have the basic structure in Fig. 1 below:

Which may contain double bonds between its ring members.

Which may contain double bonds between its ring members.

(1) Note. The phenanthrene portion of this tetracyclic ring system cannot be completely aromatic; it must be hydrogenated to some degree.
(2) Note. In the indents hereunder which refer to positions, the numbers shown in this definition are employed.
(3) Note. Included herein are compounds which contain an additional ring fused to one or more of the rings of the cyclopentanohydrophenanthrene ring system. See subclasses 510-514.
(4) Note. The following structure shows the numbering system for substituents at the 17-position of the cyclopentanohydrophenanthrene ring system:

Image 2 for class 552 subclass 502

(5) Note. A substituent at the 17-position of the cyclopentano-hydrophenanthrene ring system is designated as alpha or beta depending upon the stereochemical configuration thereof. A 17 beta-substituent is normally written or drawn directly above the 17-carbon atom and attached thereto by a solid line; a 17-alpha substituent is normally written or drawn to the right of the 17-carbon atom and attached thereto by dotted lines. The drawings below illustrate a cyano substituent as both a 17-beta and 17-alpha substituent.

17B-cyano-3, 16a-diacetoxyestr -1,3,5(10)-trien-17a-ol

17B-cyano-3, 16a-diacetoxyestr -1,3,5(10)-trien-17a-ol

17a-cyano-3, 16a-diacetoxyestra-1,3,5,(10)-trien-17B-ol

17a-cyano-3, 16a-diacetoxyestra-1,3,5,(10)-trien-17B-ol

SEE OR SEARCH THIS CLASS, SUBCLASS:

653,for Vitamin D compounds, calciferols, cholecalciferols, ergocalciferols, activated ergosterols, activated 7-dehydrocholesterols, irradiated ergosterol, irradiated 7-dehydrocholesterol, antirachitic vitamins, dihydrotachysterols, and 3,5-cyclovitamin D compounds.

SEE OR SEARCH CLASS:

514Drug, Bio-Affecting and Body Treating Compositions,   subclasses 169+ for a medicinal composition including a cyclopentanohydrophenanthrene compound.
536Organic Compounds,   subclasses 5+ for steroid glucosides, e.g., digitalis glucosides.
540Organic Compounds,   subclasses 2+ for cyclopentanohydrophenanthrene compounds containing a heterocyclic nucleus.
  
[List of Patents for class 552 subclass 503]    503With preservative or stabilizer
 This subclass is indented under subclass 502.  Products which contain a compound having a cyclopenthanohydrophenanthrene ring system in admixture with a preserving or stabilizing agent whose sole function is to prevent physical or chemical change.
  
[List of Patents for class 552 subclass 504]    504Heavy metal or aluminum containing
 This subclass is indented under subclass 502.  Compounds which include aluminum or a metal having a specific gravity greater than four.
(1) Note. Arsenic is considered a heavy metal.

Image 1 for class 552 subclass 504

(2) Note. An example of a compound provided for herein is:
  
[List of Patents for class 552 subclass 505]    505Boron, silicon, selenium or tellurium containing
 This subclass is indented under subclass 502.  Compounds which contain boron, silicon, selenium or tellurium.
  
[List of Patents for class 552 subclass 506]    506Phosphorus attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding
 This subclass is indented under subclass 502.  Compounds wherein phosphorus is attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 506

  
[List of Patents for class 552 subclass 507]    507The phosphorus is bonded directly at the 21-position or is bonded directly to a chalcogen which is bonded directly at the 21-positon
 This subclass is indented under subclass 506.  Compounds wherein the phosphorus is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system or is bonded directly to a chalcogen which is bonded directly at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 507

  
[List of Patents for class 552 subclass 508]    508Spiro
 This subclass is indented under subclass 502.  Compounds which contain a spiro ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 508

  
[List of Patents for class 552 subclass 509]    509Plural cyclopentanohydrophenanthrene ring systems
 This subclass is indented under subclass 502.  Compounds which contain at least two cyclopentanohydrophenanthrene ring systems.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 509

  
[List of Patents for class 552 subclass 510]    510The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos
 This subclass is indented under subclass 502.  Compounds in which the cyclopentanohydrophenanthrene ring system and at least one additional ring are parts of a polycyclo ring system having at least five cyclos.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 510

SEE OR SEARCH THIS CLASS, SUBCLASS:

500+,for cyclogonanes, e.g., 3,5-cyclocholesterols, 3,5-cycloandrostanes, 5,9-cyclopregnanes, etc.
  
[List of Patents for class 552 subclass 511]    511The additional ring shares the 1,2-positions of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 510.  Compounds in which additional ring is ortho-fused to the A ring of the cyclopentanohydrophenanthrene ring system at the 1,2-positions.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 511

  
[List of Patents for class 552 subclass 512]    512The additional ring shares the 5,10- or 5,19-positions of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 510.  Compounds in which the additional ring shares the 5,10- or 5,19-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 512

  
[List of Patents for class 552 subclass 513]    513The additional ring shares the 6,7-positions of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 510.  Compounds in which the additional ring is otho-fused to the B ring of the cyclopentanohydrophenanthrene ring system at the 6,7-positions.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 514]    514The additional ring shares the 16,17-positions of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 510.  Compounds in which the additional ring is ortho-fused to the D ring of the cyclopentanohydrophenanthrene ring system at the 16,17-positions.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 515]    515Nitrogen bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds in which nitrogen is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 516]    516The nitrogen is double bonded to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 515.  Compounds in which the nitrogen is double bonded to the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 517]    517The nitrogen is part of a semicarbazone or thiosemicarbazone group
 This subclass is indented under subclass 516.  Compounds wherein the nitrogen is part of a semicarbazone or thiosemicarbazone group.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 518]    518Additional nitrogen bonded directly to the nitrogen (e.g., hydrazones, etc.)
 This subclass is indented under subclass 516.  Compounds wherein an additional nitrogen is bonded directly to the nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 519]    519Oxygen bonded directly to the nitrogen (e.g., oximes, isonitrosos, etc.)
 This subclass is indented under subclass 516.  Compounds wherein oxygen is bonded directly to the nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 520]    520The nitrogen is bonded directly at the 3-position
 This subclass is indented under subclass 519.  Compounds wherein the nitrogen is bonded directly at the 3-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 521]    521The nitrogen is bonded directly at the 3-position
 This subclass is indented under subclass 515.  Compounds wherein the nitrogen is bonded directly at the 3-position of the cyclopenthanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 522]    522The nitrogen is bonded directly at the 17-position
 This subclass is indented under subclass 515.  Compounds wherein the nitrogen is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 523]    523Sulfur bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds in which sulfur is bonded directly to the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 524]    524The sulfur is bonded directly at the 1- or 3-position
 This subclass is indented under subclass 523.  Compounds wherein the sulfur is bonded directly at the 1- or 3-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 525]    525The sulfur is bonded directly at the 16- or 17-position
 This subclass is indented under subclass 523.  Compounds wherein the sulfur is bonded directly at the 16- or 17-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 526]    526Carbon double bonded directly to the cyclopentanohydrophenantrene ring system
 This subclass is indented under subclass 502.  Compounds in which carbon is double bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provide for herein is:

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[List of Patents for class 552 subclass 527]    527The carbon is double bonded directly at the 2-position
 This subclass is indented under subclass 526.  Compounds wherein the carbon is double bonded directly at the 2-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 528]    528The carbon is double bonded directly at the 16-position
 This subclass is indented under subclass 526.  Compounds wherein the carbon is double bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 529]    529And carbon bonded directly at the 17 beta-position is a member of an acyclic chain of two or more uninterrupted carbons
 This subclass is indented under subclass 528.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two or more uninterrupted carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 530]    530The carbon is double bonded directly at the 17-position (e.g., fusidic acids, etc.)
 This subclass is indented under subclass 526.  Compounds wherein the carbon is double bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 531]    531Nitrogen or sulfur containing
 This subclass is indented under subclass 530.  Compounds which contain nitrogen or sulfur.
  
[List of Patents for class 552 subclass 532]    532The carbon is a member of an acyclic chain of exactly two carbons (e.g., 3 keto-4,17(20)-pregnadienes, 17-ethylidene-estranes,etc.)
 This subclass is indented under subclass 530.  Compounds wherein the carbon bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of exactly two carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 533]    533Plural oxygens bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 532.  Compounds wherein plural oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 534]    534And oxygen bonded directly at the 21-position of the compound
 This subclass is indented under subclass 533.  Compounds wherein oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein:

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[List of Patents for class 552 subclass 535]    535Halogen bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds wherein halogen is bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 536]    536Halogen bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds wherein halogen is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 537]    537Plural halogens bonded directly at the 16-position
 This subclass is indented under subclass 536.  Compounds wherein plural halogens are bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 538]    538Carbon bonded directly at the 17 beta-position is a member of an acyclic chain of two or more uninterrupted carbons
 This subclass is indented under subclass 536.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two or more uninterrupted carbons.
(1) Note. An example of a compound provided for here in is:

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[List of Patents for class 552 subclass 539]    539Halomethyl bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., 16-trifluoromethyl progesterones, etc.)
 This subclass is indented under subclass 502.  Compounds wherein halomethyl is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 540]    540Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of six or more uninterrupted carbons (e.g., sterols, etc.)
 This subclass is indented under subclass 502.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of six or more uninterrupted carbons.
(1) Note. An example of a compound provided for herein is:

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SEE OR SEARCH THIS CLASS, SUBCLASS:

653,for Vitamin D compounds, calciferols, cholecalciferols, ergocalciferols, activated ergosterols, activated 7-dehydrocholesterols, irradiated ergosterol, irradiated 7-dehydrocholesterol, antirachitic vitamins, dihydrotachysterols and 3,5-cyclovitamin D compounds.

SEE OR SEARCH CLASS:

514Drug, Bio-Affecting and Body Treating Compositions,   subclasses 169+ for a medicinal composition including a sterol compound.
  
[List of Patents for class 552 subclass 541]    541Oxygen bonded directly at the 1-, 2-, or 4-position
 This subclass is indented under subclass 540.  Compounds wherein oxygen is bonded directly at the 1-, 2-, or 4-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 542]    542Oxygen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 540.  Compounds wherein oxygen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 543]    543Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 540.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 544]    544Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., cholesterols, cholestanols, stigmasterols, etc.)
 This subclass is indented under subclass 540.  Compounds in which exactly one oxygen is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. Lanolin is provided for in this subclass.
(2) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 545]    545Processes of isolating, purifying or recovering from animal, vegetable or fungal sources (e.g., wool fat or grease, lanolin, fish oils, animal tissue, soybean oil, tall oil or pitch, wood products, sugar cane, soap stocks, yeast, molds, etc.)
 This subclass is indented under subclass 544.  Processes which include isolating, purifying or recovering the cyclopentanohydrophenanthrene containing compound from animal, vegetable or fungal sources.
  
[List of Patents for class 552 subclass 546]    546Halogen or oxygen bonded directly to the acyclic carbon chain at the 17 beta-position (e.g., 25-hydroxy cholesterols, etc.)
 This subclass is indented under subclass 544.  Compounds in which halogen or oxygen is bonded directly to the acyclic carbon chain at the 17 beta-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 547]    547Unsaturation between the 7- and 8-positions (e.g., ergosterols, 7 dehydrocholesterols, provitamin D, etc.)
 This subclass is indented under subclass 544.  Compounds which contain a double bond between the 7- and 8-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 547

SEE OR SEARCH THIS CLASS, SUBCLASS:

653,for Vitamin D compounds, calciferols, cholecalciferols, ergocalciferols, activated ergosterols, activated 7-dehydrocholesterols, irradiated ergosterol, irradiated 7-dehydrocholesterol, antirachitic vitamins, dihydrotachysterols and 3,5-cyclovitamin D compounds.
  
[List of Patents for class 552 subclass 548]    548Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of five uninterrupted carbons (e.g., choladienes, cholanic acids, etc.) stocks, yeast, molds, etc.)
 This subclass is indented under subclass 502.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of five uninterrupted carbons.
(1) Note. Bile acids are provided for in this subclass and the subclasses indented hereunder, i.e., 549-552.
(2) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 549]    549Oxygen bonded directly at the 12-position (e.g., cholic acids, desoxycholic acids, dehydrocholic acids, etc.)
 This subclass is indented under subclass 548.  Compounds wherein oxygen is bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 550]    550Halogen, nitrogen, or sulfur containing (e.g., glycocholic acids, taurocholic acids, etc.)
 This subclass is indented under subclass 549.  Compounds which contain halogen, nitrogen or sulfur.
  
[List of Patents for class 552 subclass 551]    551Oxygen bonded directly at the 6- or 7-position (e.g., chenodeoxycholic acids, ursodeoxycholic acids, etc.)
 This subclass is indented under subclass 548.  Compounds wherein oxygen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 552]    552Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., 3-hydroxycholanic acids, lithocholic acids, etc.)
 This subclass is indented under subclass 548.  Compounds in which exactly one oxygen is bonded directly to the cyclopentanopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 553]    553Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of three or four uninterruped carbons, (e.g., diketobisnorcholenic acids, etc.)
 This subclass is indented under subclass 502.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of three or four uninterrupted carbons.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 554]    554Halogen or nitrogen containing (e.g., 20-cyano-pregnanes, 21-cyano pregnenes, etc.)
 This subclass is indented under subclass 553.  Compounds which contain halogen or nitrogen.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 555]    555Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., 3-keto-bisnorcholenic acids, 3-keto-bisnor-cholene-22 als, etc.)
 This subclass is indented under subclass 553.  Compounds in which exactly one oxygen is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 556]    556And oxygen bonded directly at the 20-position of the compound
 This subclass is indented under subclass 555.  Compounds wherein oxygen is bonded directly to the carbon at the 20-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 557]    557Carbon bonded directly at the 17-beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons (e.g., pregnanes, etc.)
 This subclass is indented under subclass 502.  Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 558]    558The A ring is a benzene ring
 This subclass is indented under subclass 557.  Compounds in which the A ring of the cyclopentanohydrophenanthrene ring system contains three alternating double bonds (i.e., is a benzene ring).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 559]    559Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 557.  Compounds wherein three or more oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 560]    560Oxygen bonded directly at the 1-, 2- or 4-position
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 1-, 2-, or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 561]    561Oxygen bonded directly at the 6-position
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 6-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 562]    562Oxygen bonded directly at the 7-, 8- or 9-position
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 7-, 8-, or 9-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 563]    563Oxygen bonded directly at the 14- or 15-position
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 14- or 15-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 564]    564Oxygen bonded directly at the 16-position
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 565]    565Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 564.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 566]    566Oxygen bonded directly at the 21-position (e.g., triamcinolone, etc.)
 This subclass is indented under subclass 564.  Compounds in which oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 567]    567Halogen bonded directly at the 2- or 4-position (e.g., 4-bromocortisones, etc.)
 This subclass is indented under subclass 559.  Compounds wherein halogen is bonded directly at the 2- or 4- position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 568]    568The cyclopentanohydrophenanthrene ring system is fully saturated
 This subclass is indented under subclass 567.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 569]    569Oxygen bonded directly at the 3-, 11-, and 17-positions
 This subclass is indented under subclass 559.  Compounds wherein oxygen is bonded directly at the 3-, 11-, and 17-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 570]    570Oxygen bonded directly at the 21-position
 This subclass is indented under subclass 569.  Compounds in which oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 571]    571Carbon bonded directly at the 1-, 2- or 4-position
 This subclass is indented under subclass 570.  Compounds wherein carbon is bonded directly at the 1-, 2-, or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 572]    572Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 570.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 573]    573Carbon bonded directly at the 16-position
 This subclass is indented under subclass 572.  Compounds wherein carbon is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 574]    574Carbon bonded directly at the 16-position (e.g., betamethasones, dexamethasones, etc.)
 This subclass is indented under subclass 570.  Compounds wherein carbon is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 575]    575Nitrogen or sulfur containing
 This subclass is indented under subclass 570.  Compounds which contain nitrogen or sulfur.
  
[List of Patents for class 552 subclass 576]    576Unsaturation between the 1- and 2-positions and the 4- and 5-positions (e.g., prednisones, prednisolones, etc.)
 This subclass is indented under subclass 570.  Compounds which contain double bonds between the 1,2-positions and the 4,5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of compound provided for herein is:

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[List of Patents for class 552 subclass 577]    577Unsaturation between the 4- and 5-positions (e.g., cortisones, etc.)
 This subclass is indented under subclass 570.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 578]    578Additional unsaturation in the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 577.  Compounds which contain an additional double bond between ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 579]    579The cyclopentanohydrophenanthrene ring system is fully saturated
 This subclass is indented under subclass 570.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 580]    580Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 569.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 581]    581Unsaturation between the 4- and 5-positions (e.g., 21-thiol prednisones, 21 thio cortisones, etc.)
 This subclass is indented under subclass 569.  Compounds which contain a double bond between the 4-and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 582]    582Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 557.  Compounds wherein two oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 583]    583Oxygen bonded directly at the 5-, 6- or 7-position
 This subclass is indented under subclass 582.  Compounds wherein oxygen is bonded directly at the 5-, 6-, or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 584]    584Oxygen bonded directly at the 12-position
 This subclass is indented under subclass 582.  Compounds wherein oxygen is bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 585]    585Oxygen bonded directly at the 15- or 16-position
 This subclass is indented under subclass 582.  Compounds wherein oxygen is bonded directly at the 15- or 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 586]    586Oxygen bonded directly at the 3- and 11-position
 This subclass is indented under subclass 582.  Compounds wherein oxygen is bonded directly at the 3- and 11-positions of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 587]    587Oxygen bonded directly at the 21-position
 This subclass is indented under subclass 586.  Compounds wherein oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 588]    588Unsaturation between the 4- and 5-positions (e.g., aldosterones, corticosterones, etc.)
 This subclass is indented under subclass 587.  Compounds which contain a double between 4- and 5- positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 589]    589Carbon bonded directly at the 16-position
 This subclass is indented under subclass 586.  Compounds wherein carbon is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 590]    590Unsaturation between the 4- and 5-positions
 This subclass is indented under subclass 586.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 591]    591The cyclopentanohydrophenanthrene ring system is fully saturated
 This subclass is indented under subclass 586.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 592]    592Oxygen bonded directly at the 3- and 17-positions
 This subclass is indented under subclass 582.  Compounds wherein oxygen is bonded directly at the 3- and 17-positions of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 593]    593Oxygen bonded directly at the 21-position
 This subclass is indented under subclass 592.  Compounds wherein oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 593

  
[List of Patents for class 552 subclass 594]    594Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 593.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 595]    595Unsaturation between the 4- and 5-positions (e.g., 17-alpha-hydroxy progesterones, etc.)
 This subclass is indented under subclass 593.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 595

  
[List of Patents for class 552 subclass 596]    596Carbon bonded directly at the 16-position
 This subclass is indented under subclass 592.  Compounds wherein carbon is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 597]    597Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 592.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 598]    598Unsaturation between the 4- and 5-positions
 This subclass is indented under subclass 592.  Compounds which contain a double bond between the 4- and 5- positions of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 599]    599Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 557.  Compounds wherein exactly one oxygen is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 600]    600Oxygen bonded directly at the 21-position
 This subclass is indented under subclass 599.  Compounds wherein oxygen is bonded directly to the carbon at the 21-position of the acyclic carbon chain that is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 601]    601Unsaturation between the 4- and 5-position (e.g., desoxycorticosterones, etc.)
 This subclass is indented under subclass 600.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 601

  
[List of Patents for class 552 subclass 602]    602Additional unsaturation in the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 601.  Compounds which contain an additional double bond between ring members of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 603]    603Carbon or halogen bonded directly at the 1-, 2-, 3-, 4- or 5-position
 This subclass is indented under subclass 599.  Compounds wherein carbon or halogen is bonded directly at the 1-,2-,3-,4-, or 5-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 604]    604Carbon bonded directly at the 16-position (e.g., 16-cyanopregn-4-ene-3, 20 diones, etc.)
 This subclass is indented under subclass 599.  Compounds wherein carbon is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 605]    605Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 599.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 606]    606Unsaturation between the 5- and 6-positions (e.g., pregnenolones, etc.)
 This subclass is indented under subclass 599.  Compounds which contain a double bond between the 5- and 6-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 606

  
[List of Patents for class 552 subclass 607]    607Unsaturation between the 4- and 5-positions (e.g., progesterones, etc.)
 This subclass is indented under subclass 599.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 607

  
[List of Patents for class 552 subclass 608]    608Additional unsaturation in the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 607.  Compounds which contain an additional double bond between ring members of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 609]    609The cyclopentanohydrophenanthrene ring system is fully saturated (e.g., pregnandiols, pregnanolones, etc.)
 This subclass is indented under subclass 599.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 610]    610Acyclic carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system (e.g., etiocholanic acids, 17 cyanoetiocholanes, 17-aldehydrostanes, etc.)
 This subclass is indented under subclass 502.  Compounds wherein an acyclic carbon is bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 611]    611Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., 3-keto-etiocholanic acids, etc.)
 This subclass is indented under subclass 610.  Compounds wherein exactly one oxygen is bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 611

  
[List of Patents for class 552 subclass 612]    612Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds wherein three or more oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 613]    613Oxygen bonded directly at the 1-position
 This subclass is indented under subclass 612.  Compounds wherein oxygen is bonded directly at the 1-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 614]    614Oxygen bonded directly at the 2- or 4-position
 This subclass is indented under subclass 612.  Compounds wherein oxygen is bonded directly at the 2- or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 615]    615Oxygen bonded directly at the 5-, 6- or 7-position
 This subclass is indented under subclass 612.  Compounds wherein oxygen is bonded directly at the 5-,6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 616]    616Oxygen bonded directly at the 16-position
 This subclass is indented under subclass 612.  Compounds wherein oxygen is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 617]    617The A ring is a benzene ring (e.g., estriols, etc.)
 This subclass is indented under subclass 616.  Compounds in which the A ring of the cyclopentanohydrophenanthrene ring system contains three alternating double bonds (i.e., is a benzene ring).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 618]    618The A ring is a benzene ring
 This subclass is indented under subclass 612.  Compounds in which the A ring of the cyclopentanohydrophenanthrene ring system contains three alternating double bonds (i.e., is a benzene ring).
  
[List of Patents for class 552 subclass 619]    619Oxygen bonded directly at the 3-, 11- and 17-positions (e.g., 1-androstene 3,11,17-triones, etc.)
 This subclass is indented under subclass 612.  Compounds wherein oxygen is bonded directly at the 3-, 11- and 17-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 619

  
[List of Patents for class 552 subclass 620]    620Carbon or halogen bonded directly at the 1, 2- or 4-position
 This subclass is indented under subclass 619.  Compounds wherein carbon or halogen is bonded directly at the 1-,2-, or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 621]    621Unsaturation between the 4- and 5-positions (e.g., adrenosterones, 11 hydroxytestosterones, etc.)
 This subclass is indented under subclass 619.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 622]    62217 alpha-position substituted (e.g., 11-keto-17 alpha-alkyltestosterones, etc.)
 This subclass is indented under subclass 621.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 623]    623Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds wherein two oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 623

  
[List of Patents for class 552 subclass 624]    624Oxygen bonded directly at the 16-position
 This subclass is indented under subclass 623.  Compounds wherein oxygen is bonded directly at the 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 625]    625The A ring is a benzene ring (e.g., estrones, estradiols, etc.)
 This subclass is indented under subclass 623.  Compounds in which the A ring of the cyclopentanohydrophenanthrene ring system contains three alternating double bonds (i.e., is a benzene ring).
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 626]    626Nitrogen or sulfur containing
 This subclass is indented under subclass 625.  Compounds which contain nitrogen or sulfur.
  
[List of Patents for class 552 subclass 627]    627Carbon or halogen bonded directly at the 1-, 2- or 4-position
 This subclass is indented under subclass 625.  Compounds wherein carbon or halogen is bonded directly at the 1-, 2-, or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 628]    628Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 625.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 629]    629Carbon bonded directly at the 11-, 15- or 16-position
 This subclass is indented under subclass 625.  Compounds wherein carbon is bonded directly at the 11-, 15-, or 16-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 630]    63017 alpha-position substituted
 This subclass is indented under subclass 625.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 631]    631The 17 alpha-position substituent contains acyclic carbon-to-carbon unsaturation
 This subclass is indented under subclass 630.  Compounds in which the substituent bonded directly at the 17 alpha-position contains acyclic carbon-to-carbon unsaturation.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 632]    63219-position substituted (e.g., 19-methylene-androstanes, 10-cyanoestranes, etc.)
 This subclass is indented under subclass 623.  Compounds in which a substituent is bonded directly at the 19-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 632

(2) Note. The 19-position is present in the cyclopentanohydrophenanthrene ring system when a carbon is bonded directly at the 10-position of the cyclopentanohydrophenanthrene ring system, said carbon being designated the 19-position.
  
[List of Patents for class 552 subclass 633]    633Carbon bonded directly at the 10- and 13-positions (e.g., androstenes, etc.)
 This subclass is indented under subclass 623.  Compounds wherein carbon is bonded directly at the 10- and 13-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 634]    634Carbon or halogen bonded directly at the 1- or 3-position
 This subclass is indented under subclass 633.  Compounds wherein carbon or halogen is bonded directly at the 1- or 3-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 635]    635Carbon or halogen bonded directly at the 2- or 4-position
 This subclass is indented under subclass 633.  Compounds wherein carbon or halogen is bonded directly at the 2- or 4-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 636]    636Unsaturation between the 5- and 6-positions (e.g., dehydroandrosterones, etc.)
 This subclass is indented under subclass 633.  Compounds which contain a double bond between the 5- and 6-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 637]    63717 alpha-position substituted (e.g., 17 alpha-ethynyl-5-androstene-3 beta, 17 beta-diols, etc.)
 This subclass is indented under subclass 636.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 637

  
[List of Patents for class 552 subclass 638]    638Unsaturation between the 4- and 5-positions (e.g., testosterones, etc.)
 This subclass is indented under subclass 633.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 638

  
[List of Patents for class 552 subclass 639]    63917 alpha-position substituted (e.g., 17 alpha-alkynylandrosta-4, 6-diene 3,17-diols, etc.)
 This subclass is indented under subclass 638.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 639

  
[List of Patents for class 552 subclass 640]    640Additional unsaturation in the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 638.  Compounds which contain an additional double bond between ring members of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 641]    641The cyclopentanohydrophenanthrene ring system is fully saturated (e.g., androstandiols, androsterones, dihydrotestosterones, etc.)
 This subclass is indented under subclass 633.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 642]    642Carbon bonded directly at the 13-position (e.g., 19-norandrostenes, estradienes, etc.)
 This subclass is indented under subclass 623.  Compounds wherein carbon is bonded directly at the 13-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 643]    643Carbon or halogen bonded directly at the 1-, 2-, 4- or 5-position
 This subclass is indented under subclass 642.  Compounds wherein carbon or halogen is bonded directly at the 1-, 2-, 4-, or 5-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 644]    644Unsaturation between the 5- and 10-positions
 This subclass is indented under subclass 642.  Compounds which contain a double bond between the 5- and 10-positions of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 645]    64517 alpha-position substituted (e.g., 17 alpha-ethynyl-17-hydroxy-5(10) estren-3-ones, etc.)
 This subclass is indented under subclass 644.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 645

  
[List of Patents for class 552 subclass 646]    646Unsaturation between the 4- and 5-positions (e.g., 19-nortestosterones, 13 beta-alkyl-4-gonene-3,17-diones etc.)
 This subclass is indented under subclass 642.  Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.
(1) Note. Examples of compounds provided for herein are:

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[List of Patents for class 552 subclass 647]    647Carbon or halogen bonded directly at the 6- or 7-position
 This subclass is indented under subclass 646.  Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 648]    64817 alpha-position substituted (e.g., 17 alpha-ethynyl-19 nortestosterones, etc.)
 This subclass is indented under subclass 646.  Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 648

  
[List of Patents for class 552 subclass 649]    649The cyclopentanohydrophenanthrene ring system is fully saturated (e.g., 17 alpha-alkyl-17 beta-hydroxyestran-3-ones, etc.)
 This subclass is indented under subclass 642.  Compounds wherein there are no double bonds between any ring members of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

Image 1 for class 552 subclass 649

  
[List of Patents for class 552 subclass 650]    650Oxygen bonded directly at the 16- or 17-position of the cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 502.  Compounds wherein oxygen is bonded directly at the 16- or 17-position of the cyclopentanohydrophenanthrene ring system.
(1) Note. An example of a compound provided for herein is:

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[List of Patents for class 552 subclass 651]    651Carbon or halogen bonded directly at the 1- or 3-position
 This subclass is indented under subclass 650.  Compounds wherein carbon or halogen is bonded directly at the 1- or 3-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 652]    652Carbon or halogen bonded directly at the 2-, 4- or 5-position
 This subclass is indented under subclass 650.  Compounds wherein carbon or halogen is bonded directly at the 2-, 4-, or 5-position of the cyclopentanohydrophenanthrene ring system.
  
[List of Patents for class 552 subclass 653]    6539,10-Seco-cyclopentanohydrophenanthrene ring system or 9,10-seco cyclopentanohydrophenanthrene ring system having a bond between the 3- and 5-positions (e.g., vitamin D compounds, cholecalciferols, activated 7-dehydrocholesterols, dihydrotachysterols, 3,5 cyclovitamin D compounds, etc.)
 This subclass is indented under subclass 350.  Compounds under Class 260, ... , which have the following basic structures:
(1) Note. Examples of compounds provided for herein are:

Image 1 for class 552 subclass 653