US PATENT SUBCLASS 508 / 270
.~.~.~.~ Chalcogen in the hetero ring (e.g., benzoxazoles, etc.)

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}
269  DF  .~.~.~ Plural hetero atoms in the hetero ring (e.g., pyrazoles, benzimidazoles, etc.) {3}
270.~.~.~.~ Chalcogen in the hetero ring (e.g., benzoxazoles, etc.) {3}
271  DF  .~.~.~.~.~> The chalcogen is sulfur (e.g., 1,3-thiazole,etc.) {2}
277  DF  .~.~.~.~.~> Chalcogen or nitrogen bonded directly to ring carbon of the hereto ring (e.g., 2-oxazolidinoes, etc.)
278  DF  .~.~.~.~.~> Exactly one double bond in the hetero ring (e.g., bis-2-oxazolines, etc.)

DEFINITION

Classification: 508/270

Chalcogen in the hetero ring (e.g., benzoxazoles, etc.):

(under subclass 269) Compositions wherein the hetero ring with carbon and nitrogen ring members also has chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) as a ring member.

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