US PATENT SUBCLASS 508 / 287
.~.~.~ Plural oxygens double bonded directly to ring carbons of the hetero ring which are adjacent to the ring nitrogen

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}
268  DF  .~.~ The hetero ring contains five members including nitrogen and carbon (e.g., polyvinylpyrrolidone, etc.) {4}
287.~.~.~ Plural oxygens double bonded directly to ring carbons of the hetero ring which are adjacent to the ring nitrogen {4}
288  DF  .~.~.~.~> Polycyclo ring system which contains the hetero ring as one of the cyclos (i.e., fused or bridged ring system)
289  DF  .~.~.~.~> Sulfur attached directly or indirectly to the hetero ring by nonionic bonding
290  DF  .~.~.~.~> Additional oxygen attached directly or indirectly to the hetero ring by nonionic bonding {1}
293  DF  .~.~.~.~> Nitrogen attached directly or indirectly to the hetero ring by nonionic bonding {2}

DEFINITION

Classification: 508/287

Plural oxygens double bonded directly to ring carbons of the hetero ring which are adjacent to the ring nitrogen:

(under subclass 268) Compositions wherein two carbons of the hetero ring, each adjacent to the ring nitrogen atom, are double bonded directly to oxygen.

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