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:
Jan. 07, 1986
Filed:
May. 08, 1984
Applicant:
Inventors:
Assignee:
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252 / ; 526287 ;
Abstract
Water-soluble copolymers of 10-30 mole % of (meth)acrylic acids, 1-10 mole % of sulfo group-containing (meth)acrylic monomers and 60-89 mole % of (meth)acrylamides, which copolymers have inherent viscosity of 10-25 dl/g, have improved mechanical shear stability and improved viscosity-increasing property even under contact with water containing impurities and are used for enhanced oil recovery.
Okada, Masashi. (1986). Water-soluble copolymers useful for enhanced oil recovery (U.S. Patent No. 4563290). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4563290
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile