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:
Jun. 23, 2020
Filed:
Jan. 25, 2017
Applicant:
S.p.c.m. SA, Andrezieux Boutheon, FR;
Inventors:
Gatien Faucher, Andrezieux Boutheon, FR;
Damien Fougerouse, Andrezieux Boutheon, FR;
René Hund, Andrezieux Boutheon, FR;
Assignee:
S.P.C.M. SA, Andrezieux Boutheon, FR;
Primary Examiner:
Int. Cl.
CPC ...
D21H 21/10 (2006.01); D21H 17/41 (2006.01); D21H 21/18 (2006.01); D21H 17/44 (2006.01); D21H 17/45 (2006.01); D21H 23/04 (2006.01);
U.S. Cl.
CPC ...
D21H 21/10 (2013.01); D21H 17/41 (2013.01); D21H 17/44 (2013.01); D21H 17/45 (2013.01); D21H 17/455 (2013.01); D21H 21/18 (2013.01); D21H 23/04 (2013.01);
Abstract
The present invention relates to a process for manufacturing a sheet of paper and/or board from a fibrous suspension, according to which, before the formation of said sheet, added to the fibrous suspension, at one or more injection points, are at least two retention aids respectively: The polymer P2 is added to the fibrous suspension after dissolving, in aqueous solution, the polymer P2 previously obtained by one of the following polymerization techniques: The polymer P2 has a factor F>2,