US PATENT SUBCLASS 507 / 237
.~.~.~ Organic component contains a direct carbon to phosphorous nonionic bond (e.g., phosphonate, etc.)

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}
237.~.~.~ Organic component contains a direct carbon to phosphorous nonionic bond (e.g., phosphonate, etc.)

DEFINITION

Classification: 507/237

Organic component contains a direct carbon to phosphorous nonionic bond (e.g., phosphonate, etc.):

(under subclass 235) Compositions wherein the organic component contains a direct nonionic carbon to phosphorous bond.