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:
Jan. 28, 2020
Filed:
Oct. 10, 2016
Applicant:
Omya International Ag, Oftringen, CH;
Inventors:
Patrick A. C. Gane, Rothrist, CH;
Samuel Rentsch, Spiegel bei Bern, CH;
Matthias Welker, Hésingue, FR;
Catherine Jean Ridgway, Mühlethal, CH;
Assignee:
OMYA INTERNATIONAL AG, Oftringen, CH;
Primary Examiner:
Int. Cl.
CPC ...
D21C 5/02 (2006.01); D21H 19/40 (2006.01); D21H 19/52 (2006.01); D21H 19/54 (2006.01); D21H 19/44 (2006.01);
U.S. Cl.
CPC ...
D21C 5/027 (2013.01); D21C 5/025 (2013.01); D21H 19/40 (2013.01); D21H 19/44 (2013.01); D21H 19/52 (2013.01); D21H 19/54 (2013.01); Y02W 30/648 (2015.05);
Abstract
A process for the deinking of a coated paper or paperboard is disclosed, the process comprises a step of providing a coating layer comprising a calcium- or magnesium-exchanged clay which is deposited on the paper or paperboard before the ink layer. In a further step said calcium- or magnesium-exchanged clay is activated and the paper is subsequently treated with water.