US PATENT SUBCLASS 507 / 240
.~.~.~ Organic component is quaternary ammonium salt

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}
239  DF  .~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding {6}
240.~.~.~ Organic component is quaternary ammonium salt

DEFINITION

Classification: 507/240

Organic component is quaternary ammonium salt:

(under subclass 239) Compositions wherein the organic component is a quaternary ammonium salt.