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:
Sep. 30, 1986
Filed:
Jun. 15, 1984
Applicant:
Inventors:
Nelson S Marans, Silver Spring, MD (US);
Stephen M Pulford, Baltimore, MD (US);
Assignee:
W. R. Grace & Co., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 61 ; 525 56 ; 525414 ; 525417 ; 525540 ;
Abstract
The present invention is directed to a high molecular weight, water soluble polymer product of polyethyleneimine, said product is formed by reacting a linear polyethylenimine with formaldehyde and a polyvinyl alcohol. The resultant product is useful as an improved drainage and retention aid in papermaking processes.