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:
May. 01, 1979
Filed:
Feb. 09, 1978
Applicant:
Inventors:
Kenneth G Phillips, River Forest, IL (US);
Wood E Hunter, Memphis, TN (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F17D / ; E21B / ;
U.S. Cl.
CPC ...
252 / ; 137 13 ; 166308 ;
Abstract
A method of reducing friction loss in oil well fracturing through the addition of small amounts of copolymers of acrylamide and quaternary salts of dimethylaminoethyl methacrylate and dimethylaminopropyl methacrylamide.