US PATENT SUBCLASS 508 / 191
.~.~.~.~ The nitrogen heterocyclic ring contains ring chalcogen (e.g., oxazoline compounds, 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}
185  DF  .~ Organic compound containing boron {7}
189  DF  .~.~ Nitrogen containing (i.e., nitrogen and boron in the same compound) {4}
190  DF  .~.~.~ The nitrogen is in a heterocyclic ring, which ring either appears in the compound or has been reacted with a boron 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) {2}
191.~.~.~.~ The nitrogen heterocyclic ring contains ring chalcogen (e.g., oxazoline compounds, etc.)

DEFINITION

Classification: 508/191

The nitrogen heterocyclic ring contains ring chalcogen (e.g., oxazoline compounds, etc.):

(under subclass 190) Compositions wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is also a ring member in the nitrogen heterocyclic ring.

(1) Note. An example of a component provided for herein is the borate salt of N-methyl morpholine.