US PATENT SUBCLASS 508 / 278
.~.~.~.~.~ Exactly one double bond in the hetero ring (e.g., bis-2-oxazolines, etc.)

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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  DF  .~.~.~.~ Chalcogen in the hetero ring (e.g., benzoxazoles, etc.) {3}
278.~.~.~.~.~ Exactly one double bond in the hetero ring (e.g., bis-2-oxazolines, etc.)

DEFINITION

Classification: 508/278

Exactly one double bond in the hetero ring (e.g., bis-2-oxazolines, etc.):

(under subclass 270) Compositions wherein the hetero ring has exactly one double bond between ring members.

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