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:
Jun. 04, 1996
Filed:
Apr. 05, 1994
Applicant:
Inventors:
Leif Karlsson, Stenungsund, SE;
Per-Erik Hellberg, Svenshogen, SE;
Lena Eriksson, Stenungsund, SE;
Stig Svennberg, Stenungsund, SE;
Eimund Gilje, Oltedal, NO;
Siri Espedal, Stavanger, NO;
Trygve Maldal, Royneberg, NO;
Assignees:
Berol Nobel AB, Stenungsund, SE;
Den norske stats oljeselskap a.s., Stavanger, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562110 ;
Abstract
A new class of surfactants exhibits properties, which make the surfactants suitable for use in surfactant flooding for enhanced oil recovery. The surfactants have the formula