US PATENT SUBCLASS 507 / 256
.~.~.~ Organic component contains a sulfur attached directly 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}
252  DF  .~.~ Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding {2}
256.~.~.~ Organic component contains a sulfur attached directly to carbon by nonionic bonding {3}
257  DF  .~.~.~.~> Plural alkyls attached directly to the same sulfur atom or to a chain of sulfur atoms by nonionic bonding
258  DF  .~.~.~.~> Alkyl and hydrogen attached directly to the same sulfur atom or to a chain of sulfur atoms by nonionic bonding
259  DF  .~.~.~.~> The sulfur is part of a sulfonate group

DEFINITION

Classification: 507/256

Organic component contains a sulfur attached directly to carbon by nonionic bonding:

(under subclass 252) Compositions wherein the organic component contains a sulfur which is attached to a carbon directly by nonionic bonding.