US PATENT SUBCLASS 507 / 252
.~.~ Organic component contains sulfur 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}
252.~.~ Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding {2}
253  DF  .~.~.~> Organic component contains ether linkage (i.e., C-O-C) {2}
256  DF  .~.~.~> Organic component contains a sulfur attached directly to carbon by nonionic bonding {3}

DEFINITION

Classification: 507/252

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

(under subclass 203) Compositions wherein the organic component contains sulfur attached to carbon directly or indirectly by nonionic bonding.

(1) Note. Sulfur as part of an inorganic counterion to an ionic compound is not a basis for including a composition in this subclass. (For example, a quaternary alkylarsonium sulfate is classifiable in subclass 203.)