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:
Nov. 12, 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 220/56 (2006.01); C08F 2/32 (2006.01);
U.S. Cl.
CPC ...
C08F 220/56 (2013.01); C08F 2/32 (2013.01);
Abstract
Highly random acrylamide-acrylic acid copolymers are described. Ionic crosslinking of the highly random copolymers in dilute solution results in improved viscosity and gel strength compared to copolymers prepared by conventional methods. The ionically crosslinked copolymers are useful in enhanced oil recovery processes.