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US Patent 7776798 Quaternary ammonium salts as thickening agents for aqueous systems

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Is a

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Patent attributes

Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Yun-Peng Zhu0

Cenk Burgazli0

Dave Feuerbacher0

Shankar Subramanian0

Shawn Zhu0

Date of Patent

August 17, 2010

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Patent Application Number

117013530

Date Filed

February 1, 2007

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Patent Citations Received

US Patent 12024669 C-36 dimer diamine hydrochloride salt as primary viscosifier for invert-emulsion drilling fluids

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US Patent 11939521 Reuse of hypersaline brine with ionic liquids

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Patent Primary Examiner

Timothy J. Kugel

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Patent abstract

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.

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