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. 06, 1989
Filed:
Apr. 08, 1988
Applicant:
Inventor:
Wen-Ching Hsieh, Chino Hills, CA (US);
Assignee:
Union Oil Company of California, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166273 ; 166274 ; 166275 ; 252-8554 ;
Abstract
A stable latex composition possessing a viscosity of less than about 50 cp. comprised of an ethylacrylate/methylacrylic acid/acrylic acid polymer and co-surfactant system comprising a nonylphenol polyethylene oxide ether sulfate and a propoxylated, ethoxylated propylene glycol nonionic surfactant block polymer useful for increasing the viscosity of water that is injected into subterranean petroleum bearing formations for the enchanced recovery of the petroleum.