The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2008
Filed:
Sep. 20, 2004
Applicants:
Gordon T. Rivers, Houston, TX (US);
Joann Mcmahon, Arnold, MO (US);
Inventors:
Gordon T. Rivers, Houston, TX (US);
Joann McMahon, Arnold, MO (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 229/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Betaine ester quaternary ammonium compounds with reduced toxicity and improved biodegradability are formed by esterification of a haloacetic acid with an alcohol containing at least 4 carbon atoms, followed by quaternization of the halo-acetate with a tertiary amine containing at least 4 carbon atoms. In one non-limiting embodiment the alkyl substituents on the nitrogen of the tertiary amine have at least 2 carbon atoms, and in another non-limiting embodiment are each n-butyl.