US PATENT SUBCLASS 508 / 303
.~.~.~.~ Chalcogen bonded directly to ring carbon of the hetero ring

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  DF  .~.~.~ The hetero ring is five-membered {1}
303.~.~.~.~ Chalcogen bonded directly to ring carbon of the hetero ring

DEFINITION

Classification: 508/303

Chalcogen bonded directly to ring carbon of the hetero ring:

(under subclass 302) Compositions wherein ring carbon of the hetero ring is bonded directly to chalcogen (i.e. oxygen, sulfur, selenium, or tellurium).

(1) Note. An example of a component provided for herein is [figure]