US PATENT SUBCLASS 507 / 238
.~.~.~ Organic component is a phosphate ester

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}
235  DF  .~.~ Organic component contains phosphorus attached directly or indirectly to carbon by nonionic bonding {3}
238.~.~.~ Organic component is a phosphate ester

DEFINITION

Classification: 507/238

Organic component is a phosphate ester:

(under subclass 235) Compositions wherein the organic component is a phosphate ester.