US PATENT SUBCLASS 508 / 302
.~.~.~ The hetero ring is five-membered


Current as of: June, 1999
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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}
299  DF  .~.~ Sulfur-containing hetero ring {3}
302.~.~.~ The hetero ring is five-membered {1}
303  DF  .~.~.~.~> Chalcogen bonded directly to ring carbon of the hetero ring


DEFINITION

Classification: 508/302

The hetero ring is five-membered:

(under subclass 299) Compositions wherein the hetero ring consists of one ring sulfur and four ring carbons.