US PATENT SUBCLASS 507 / 247
.~.~.~ Sulfur is attached directly or indirectly to carbon 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}
247.~.~.~ Sulfur is attached directly or indirectly to carbon by nonionic bonding

DEFINITION

Classification: 507/247

Sulfur is attached directly or indirectly to carbon by nonionic bonding:

(under subclass 239) Compositions wherein the organic component contains sulfur which is attached to carbon directly or indirectly by nonionic bonding (e.g., thioureas, etc.).