| 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} |
| 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} |
| 271 |  | .~.~.~.~.~ The chalcogen is sulfur (e.g., 1,3-thiazole,etc.) {2} |
| 272 | DF | .~.~.~.~.~.~> Plural nitrogens or plural sulfurs in the hetero ring (e.g., thiadiazoles, etc.) {1} |
| 275 | DF | .~.~.~.~.~.~> Polycyclo ring system which contains the hetero ring as one of the cyclos (e.g., benzothiazoles, etc.) {1} |