US PATENT SUBCLASS 507 / 259
.~.~.~.~ The sulfur is part of a sulfonate group

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}
252  DF  .~.~ Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding {2}
256  DF  .~.~.~ Organic component contains a sulfur attached directly to carbon by nonionic bonding {3}
259.~.~.~.~ The sulfur is part of a sulfonate group

DEFINITION

Classification: 507/259

The sulfur is part of a sulfonate group:

(under subclass 256) Compositions wherein the sulfur is part of a sulfonate group.