| 508 / | HD | SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS |
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| 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} |
| 287 | DF | .~.~.~ Plural oxygens double bonded directly to ring carbons of the hetero ring which are adjacent to the ring nitrogen {4} |
| 290 |  | .~.~.~.~ Additional oxygen attached directly or indirectly to the hetero ring by nonionic bonding {1} |
| 291 | DF | .~.~.~.~.~> Nitrogen attached indirectly to the hetero ring by nonionic bonding (e.g., bis-succinimide compounds, etc.) {1} |