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:
Oct. 07, 1980
Filed:
Mar. 15, 1976
Applicant:
Inventor:
Henry A Fremont, Wyoming, OH (US);
Assignee:
Champion International Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 29 ; 2105 / ; 210650 ;
Abstract
An improved method for removal of color bodies from aqueous effluents from paper and pulp mill manufacturing operations by ultrafiltration wherein the semi-permeable membrane utilized is a polyethyleneimine coated polysulfone film.
Fremont, Henry. (1980). Color removal from paper and pulp mill aqueous effluents (U.S. Patent No. 4226673). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4226673
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile