US PATENT SUBCLASS 508 / 308
.~.~.~.~ Having -C(=O)O- attached directly or indirectly to the hetero ring by nonionic bonding (e.g., sorbitan esters, etc.)

Current as of: June, 1999
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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.~.~.~.~ Having -C(=O)O- attached directly or indirectly to the hetero ring by nonionic bonding (e.g., sorbitan esters, etc.) {3}
309  DF  .~.~.~.~.~> The carbon of the -C(=O)O- group is bonded directly to the hetero ring (e.g., furoic acid, etc.)
310  DF  .~.~.~.~.~> With organic nitrogen compound
311  DF  .~.~.~.~.~> With sulfonic or carboxylic acid, or salt thereof

DEFINITION

Classification: 508/308

Having -C(=O)O- attached directly or indirectly to the hetero ring by nonionic bonding (e.g., sorbitan esters, etc.):

(under subclass 307) Compositions wherein the hetero ring is attached directly or indirectly to a -C(=O)O- group by nonionic bonding.

(1) Note. Examples of components provided for herein are various carboxylic acid esters of sorbitans.