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:
Dec. 10, 2019
Filed:
Jun. 23, 2016
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventors:
Stephen Marrou, Mount Prospect, IL (US);
Xiangyang Zhu, Denver, CO (US);
Heqing Huang, Naperville, IL (US);
Assignee:
Ecolab USA Inc., St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 222/38 (2006.01); C08L 71/02 (2006.01); C08F 220/56 (2006.01);
U.S. Cl.
CPC ...
C08L 71/02 (2013.01); C08F 220/56 (2013.01);
Abstract
A method of making acrylamide-acrylic acid copolymers in water-in-oil latices is described. The method results in a copolymer having randomly distributed carboxylate functionalities and is suitable for ionic crosslinking. The copolymers and their ionically crosslinked counterparts are useful for enhanced oil recovery processes.