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:
Oct. 22, 2019
Filed:
Jan. 12, 2015
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventors:
Peter E. Reed, Plainfield, IL (US);
William J. Andrews, Parker, CO (US);
Ashish Dhawan, Naperville, IL (US);
Assignee:
Ecolab USA Inc., St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 8/588 (2006.01); C08F 26/04 (2006.01);
U.S. Cl.
CPC ...
C09K 8/588 (2013.01); C08F 26/04 (2013.01);
Abstract
Disclosed herein are polymer compositions useful in high temperature enhanced oil recovery applications. The polymer compositions include at least 20 mol % of an N,N-dialkyl-N,N-diallylammonium salt and further have a net negative charge. The polymer compositions provide polymer dispersions in water or brine having stable viscosity when maintained at temperatures of 100° C. and above for at least 2 days.