US PATENT SUBCLASS 508 / 376
.~.~.~.~ The nitrogen is bonded directly to -C(=X)-, wherein X is chalcogen (e.g., amides, 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}
368  DF  .~ Heavy metal or aluminum in an organic phosphorus compound having four chalcogens bonded directly to the phosphorus {5}
371  DF  .~.~ The heavy metal is zinc {4}
375  DF  .~.~.~ With organic nitrogen compound {1}
376.~.~.~.~ The nitrogen is bonded directly to -C(=X)-, wherein X is chalcogen (e.g., amides, etc.)

DEFINITION

Classification: 508/376

The nitrogen is bonded directly to -C(=X)-, wherein X is chalcogen (e.g., amides, etc.):

(under subclass 375) Compositions wherein-C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the nitrogen.