US PATENT SUBCLASS 508 / 277
.~.~.~.~.~ Chalcogen or nitrogen bonded directly to ring carbon of the hereto ring (e.g., 2-oxazolidinoes, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
270  DF  .~.~.~.~ Chalcogen in the hetero ring (e.g., benzoxazoles, etc.) {3}
277.~.~.~.~.~ Chalcogen or nitrogen bonded directly to ring carbon of the hereto ring (e.g., 2-oxazolidinoes, etc.)

DEFINITION

Classification: 508/277

Chalcogen or nitrogen bonded directly to ring carbon of the hetero ring (e.g., 2-oxazolidinones, etc.):

(under subclass 270) Compositions wherein a ring carbon of the hetero ring is bonded directly to nitrogen or to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

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