US PATENT SUBCLASS 507 / 241
.~.~.~ Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding

Current as of: June, 1999
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507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

200  DF  WELL TREATING {4}
203  DF  .~ Contains organic component {17}
239  DF  .~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding {6}
241.~.~.~ Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding

DEFINITION

Classification: 507/241

Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding:

(under subclass 239) Compositions wherein the organic

component contains plural carboxylic acid groups, carboxylic acid ester groups, or carboxylic acid salt groups which are attached to nitrogen directly or indirectly by nonionic bonding.