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:
Feb. 05, 1991
Filed:
Sep. 21, 1989
Applicant:
Inventors:
Eva M Andreasson, Gothenburg, SE;
Krister A Holmberg, Molndal, SE;
Borje Nystrom, Knivsta, SE;
Eva M Osterberg, Gothenburg, SE;
Finn Egeli, Stavanger, NO;
Assignees:
Berol Kemi AB, Stenungsund, SE;
Tendex Kjemi Service A/S, Stavanger, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
252-8554 ;
Abstract
A surface active compound for use in microemulsions useful in oil recovery, wood impregnating, dry cleaning, cleaning of hard surfaces and for floor polishing, which has one hydrophobic group, containing 9-50, preferably 12-35 carbon atoms and 2-6 separate hydrophilic end groups, at least one of the hydrophilic end groups being a nonionic group obtained by reacting a compound having a reactive hydrogen atom with an alkylene oxide having 2-4 carbon atoms and at least one being an anionic group.