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:
Jun. 11, 1985
Filed:
Jun. 15, 1984
Applicant:
Inventors:
Carl Lukach, New Castle County, DE (US);
Thomas G Majewicz, Chadds Ford, PA (US);
Albert R Reid, New Castle County, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 91 ; 106170 ; 536 95 ; 252 / ;
Abstract
Disclosed are nonionic dihydroxypropyl hydroxyalkylcelluloses having a dihydroxypropyl M.S. of from about 0.1 to 1.2 and a hydroxyalkyl M.S. of from about 1.5 to about 3.0. The dihydroxypropyl hydroxyalkylcelluloses are capable of reacting with polyvalent metal cations, such as, titanium and zirconium, in an aqueous medium, such as a salt brine medium, to form viscoelastic gels useful in oil recovery operations.