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:
Dec. 01, 1992
Filed:
Nov. 07, 1991
Applicant:
Inventors:
James E Borland, Baton Rouge, LA (US);
Terry Crutcher, Baton Rouge, LA (US);
Joe D Sauer, Baton Rouge, LA (US);
Kim R Smith, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ;
U.S. Cl.
CPC ...
252547 ; 252558 ; 252559 ; 252D / ; 252D / ; 252D / ;
Abstract
Surfactant mixtures which provide denser foams than the individual components consist of 50-90% by weight of an amine oxide corresponding to the formula RR'R'NO in which R is a primary alkyl group containing 6-24 carbons and R' and R' are independently selected from methyl, ethyl, and 2-hydroxyethyl and 50-10% by weight of an alkylbenzenesulfonate surfactant. Preferred mixtures are those in which the amine oxide is N-tetradecyldimethylamine oxide and the alkylbenzenesulfonate surfactant is sodium dodecylbenzenesulfonate.