US PATENT SUBCLASS 507 / 236
.~.~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

200  DF  WELL TREATING {4}
203  DF  .~ Contains organic component {17}
235  DF  .~.~ Organic component contains phosphorus attached directly or indirectly to carbon by nonionic bonding {3}
236.~.~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding

DEFINITION

Classification: 507/236

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

(under subclass 235) Compositions wherein nitrogen and phosphorous are attached to carbon directly or indirectly by nonionic bonding.

(1) Note. Included herein are phosphatides (e.g., lecithin), phosphoramides, etc.