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:
Mar. 18, 1986
Filed:
Sep. 29, 1982
Applicant:
Inventors:
Catherine S Chen, Berkeley Heights, NJ (US);
Albert L Williams, Princeton, NJ (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
525534 ; 252 / ; 525535 ; 528172 ; 528174 ; 528175 ; 528210 ; 528212 ; 528215 ; 528216 ;
Abstract
Certain water-soluble polymers retain their viscosities in high brine environments and are highly useful as surfactant-mobility control agents in oil recovery processes. These polymers have stiff backbone chains which are poly-2,6-dimethyl-p-phenylene oxide, polysulfone or poly(p-phenylene ether-sulfone) and side chains which may be formed by halomethylating phenyl rings of these backbone chains followed by quaternizing the halomethyl groups. For more thickening power, the molecular weight of the polymer can be increased by controlled cross-linking with a calculated amount of difunctional amine.