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. 25, 2018
Filed:
Apr. 02, 2017
Applicant:
Archroma Ip Gmbh, Reinach, CH;
Inventors:
Andrew Clive Jackson, Muenchenstein, CH;
David Puddiphatt, Grellingen, CH;
Cédric Klein, Brumath, FR;
Assignee:
ARCHROMA IP GMBH, Reinach, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 21/30 (2005.12); C07D 251/68 (2005.12); D21H 17/66 (2005.12); D21H 17/63 (2005.12); D21H 21/16 (2005.12);
U.S. Cl.
CPC ...
D21H 17/63 (2012.12); D21H 17/66 (2012.12); D21H 21/16 (2012.12); D21H 21/30 (2012.12);
Abstract
The instant invention relates to mixed salts of optical brighteners of formula (1), wherein M represents a mixture of Mgwith another cation, which provide for superior optical brightening effects when applied to the surface of paper.