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:
Apr. 22, 1986
Filed:
Jun. 12, 1985
Charles L McCormick, Hattiesburg, MS (US);
Kenneth P Blackmon, Hattiesburg, MS (US);
University of Southern Mississippi, Hattiesburg, MS (US);
Abstract
A water-soluble ionically-charged random copolymer of acrylamide and an alkaline or alkali metal 3-acrylamido-3-methylbutanoate having an average molecular weight of greater than about 50,000 has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl.sub.2 when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile