US PATENT SUBCLASS 508 / 463
.~.~ Specified compound wherein the single bonded oxygen is bonded oxygen is bonded directly to an additional carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon (i.e., specified carboxylic acid ester)

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}
459  DF  .~ Organic -C(=O)O- compound {19}
463.~.~ Specified compound wherein the single bonded oxygen is bonded oxygen is bonded directly to an additional carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon (i.e., specified carboxylic acid ester) {6}
464  DF  .~.~.~> Nitrogen bonded directly to the carbon of the -C(=O)O- group
465  DF  .~.~.~> Plural -C(=O)O- groups attached directly or indirectly to each other by nonionic bonding (e.g., estolides of hydroxy carboxylic acids, etc.) {8}
500  DF  .~.~.~> Nitrogen attached indirectly to the -C(=O)O- group by nonionic bonding
501  DF  .~.~.~> Chalcogen attached indirectly to the -C(=O)O-group by nonionic bonding (e.g., pentaerythritol monooleate, etc.) {2}
504  DF  .~.~.~> Halogen attached indirectly to the -C(=O)O- group by nonionic bonding
505  DF  .~.~.~> With hydrocarbon polymer or organic non-carboxylic acid ester oxygen compound (e.g., polybutene, dimer carboxylic acids, alcohols, etc.)

DEFINITION

Classification: 508/463

Specified compound wherein the single bonded oxygen is bonded directly to an additional carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon (i.e., specified carboxylic acid ester):

(under subclass 459) Compositions which contain a specified compound wherein an additional carbon is bonded directly to the single bonded oxygen, which carbon may be single bonded to any atom but may be multiple bonded only to carbon.

(1) Note. This subclass encompasses carboxylic acid esters.

(2) Note. The expression "specified compound" means that a carboxylic acid ester lubricant base component, in order to be classified in this subclass or its indents, must be structurally identified to the point where the component can be placed in this subclass or a specific indent on the basis of a complete structure. This structure may be expressed generically or specifically, but it must be expressed in the claims. Such descriptions as "ester," "carboxylic acid ester," "aryl ester," "aliphatic ester," "substituted carboxylic acid ester," etc. will not be deemed sufficient to warrant classification in this subclass or its indents. A generically expressed structure which would be properly classifiable herein may be exemplified by "an alkyl benzoate, substituted in the alkyl portion by halogen, amino or alkoxy." Such a generic expression allows identification of exact substances within its scope.

When a carboxylic acid ester is present as a lubricant additive rather than as a lubricant base, placement of such an additive will be effected in the normal manner.