US PATENT SUBCLASS 508 / 284
.~.~.~.~.~ Chalcogen or nitrogen bonded directly to ring carbon of the 1,3-hetero ring , or the 1,3-hetero ring has two double bonds between ring members

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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
243  DF  .~ Heterocyclic ring compound; a heterocyclic ring is one having as ring members only carbon and at least one hetero atom selected from nitrogen and chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) {4}
268  DF  .~.~ The hetero ring contains five members including nitrogen and carbon (e.g., polyvinylpyrrolidone, etc.) {4}
269  DF  .~.~.~ Plural hetero atoms in the hetero ring (e.g., pyrazoles, benzimidazoles, etc.) {3}
283  DF  .~.~.~.~ The hetero ring is a monocyclic 1,3-diazole or a monocyclic hydrogenated 1,3-diazole {3}
284.~.~.~.~.~ Chalcogen or nitrogen bonded directly to ring carbon of the 1,3-hetero ring , or the 1,3-hetero ring has two double bonds between ring members

DEFINITION

Classification: 508/284

Chalcogen or nitrogen bonded directly to ring carbon of the 1,3-hetero ring, or the 1,3-hetero ring has two double bonds between ring members:

(under subclass 283) Compositions wherein the hetero ring has two double bonds between ring members, or ring carbon of the hetero ring is bonded directly to nitrogen or to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

(1) Note. Examples of components provided for herein are [figure]