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:
Feb. 28, 1995
Filed:
Jun. 02, 1993
Applicant:
Inventors:
Rene Hund, Villars, FR;
Eric Philibert, Saint Etienne, FR;
Assignee:
S N F, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621683 ; 1621816 ; 1621818 ; 162183 ;
Abstract
Process for the manufacture of a paper or a cardboard having improved retention, in which a polyacrylamide and bentonite are added to the fibrous suspension, wherein in that the polyacrylamide is a branched polyacrylamide, which is easily soluble in water, and is introduced in the dissolved powder form at a concentration of 0.03 to 1.0 per thousand (0.03 to 1.0%) by weight of the dry weight of the fibrous suspension.