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:
Mar. 29, 1983
Filed:
Jun. 24, 1981
Applicant:
Inventors:
David W Suwala, Flanders, NJ (US);
Crowley C Allen, Jr, Durham, NC (US);
Ulrich W Kempf, Emmaus, PA (US);
Assignee:
GAF Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
D21H / ; D21D / ;
U.S. Cl.
CPC ...
162152 ; 162155 ; 162156 ; 162169 ; 162190 ;
Abstract
A carboxylated latex is added to an aqueous slurry of fibers to remove metal ions contained in solution. The water is removed to form a felt. The demetallized water removed during felt formation is recycled in a closed process water system. The carboxylated latex is formed by polymerizing an unsaturated carboxylic acid on a substantially surfactant free styrene-diene polymer latex.