US PATENT SUBCLASS 508 / 309
.~.~.~.~.~ The carbon of the -C(=O)O- group is bonded directly to the hetero ring (e.g., furoic acid, 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}
304  DF  .~.~ Oxygen-containing hetero ring (e.g., allyl glycidyl ether, etc.) {2}
307  DF  .~.~.~ The hetero ring contains at least five ring members (e.g., 1,3-dioxane, furan, etc.) {1}
308  DF  .~.~.~.~ Having -C(=O)O- attached directly or indirectly to the hetero ring by nonionic bonding (e.g., sorbitan esters, etc.) {3}
309.~.~.~.~.~ The carbon of the -C(=O)O- group is bonded directly to the hetero ring (e.g., furoic acid, etc.)


DEFINITION

Classification: 508/309

The carbon of the -C(=O)O- group is bonded directly to the hetero ring (e.g., furoic acid, etc.):

(under subclass 308) Compositions wherein the hetero ring is bonded directly to the carbon of the -C(=O)O- group.

(1) Note. An example of a component provided for herein is [figure]