This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.

 
Web www.patentalert.com

< Multi-function microphone boom with on-line indicator

> Low-density, open-cell, soft, flexible, thermoplastic, absorbent foam and method of making foam
~ 00426