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:
Dec. 27, 1994
Filed:
Jul. 15, 1993
Applicant:
Inventors:
Iqbal Ahmed, Bartlesville, OK (US);
Henry L Hsieh, Pittboro, NC (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; D21F / ; D21H / ; D21H / ;
U.S. Cl.
CPC ...
525291 ; 525293 ; 525319 ; 5253261 ; 5253333 ; 525343 ; 1621572 ; 1621574 ; 1621575 ; 1621646 ; 1621681 ; 1621682 ; 1621683 ;
Abstract
The present invention provides graft copolymers that are highly absorbent to aqueous electrolyte solutions. The graft copolymer is formed by the graft polymerizing an effective amount of each of the following components together to provide a highly absorbent copolymer: