US PATENT SUBCLASS 508 / 300
.~.~.~ Plural hetero atoms in the hetero ring (e.g., 1,3-dithiane, 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}
299  DF  .~.~ Sulfur-containing hetero ring {3}
300.~.~.~ Plural hetero atoms in the hetero ring (e.g., 1,3-dithiane, etc.)

DEFINITION

Classification: 508/300

Plural hetero atoms in the hetero ring (e.g., 1,3-dithiane, etc.):

(under subclass 299) Compositions wherein the hetero ring has more than one ring hetero atom.

(1) Note. Examples of components provided for herein are [figure] [figure]

(2) Note. This subclass also provides for components having a hetero ring with more than six members, ring sulfur and ring nitrogen, e.g., thiadiazepines, etc.