US PATENT SUBCLASS 507 / 251
.~.~.~.~.~ Organic component contains plural nitrogen atoms 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}
248  DF  .~.~.~ Organic component consists only of carbon, hydrogen, and nitrogen {2}
250  DF  .~.~.~.~ Organic component is acyclic {1}
251.~.~.~.~.~ Organic component contains plural nitrogen atoms attached directly or indirectly to carbon by nonionic bonding

DEFINITION

Classification: 507/251

Organic component contains plural nitrogen atoms attached directly or indirectly to carbon by nonionic bonding:

(under subclass 250) Compositions wherein the organic component contains two or more nitrogens (e.g., polyamines, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

246, for polyamines having an ether linkage.