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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.:

US 12529190 B1

PDFFull Text
Date of Patent:
Jan. 20, 2026

Filed:

May. 14, 2019

Coating composition for paper and paperboard

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Tuula Sokka, Imatra, FI;

Kaj Backfolk, Lappeenranta, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Chinessa T Golden

Int. Cl.
CPC ...
D21H 21/30 (2006.01); C09D 5/00 (2006.01); C09D 5/22 (2006.01); C09D 7/41 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 125/14 (2006.01); C09D 133/06 (2006.01); D21H 19/38 (2006.01); D21H 19/40 (2006.01); D21H 19/42 (2006.01); D21H 19/58 (2006.01); D21H 19/82 (2006.01);
U.S. Cl.
CPC ...
D21H 21/30 (2013.01); C09D 5/002 (2013.01); C09D 5/22 (2013.01); C09D 7/41 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 125/14 (2013.01); C09D 133/062 (2013.01); D21H 19/385 (2013.01); D21H 19/40 (2013.01); D21H 19/42 (2013.01); D21H 19/58 (2013.01); D21H 19/822 (2013.01);
Abstract

The present invention relates to a coating composition for coating of paper or paperboard, said composition comprising: a pigment, a binder, an optical brightening agent (OBA), a colorant, and a sugar alcohol, and to paper or paperboard coated with at least one layer of the coating composition. The present invention further relates to a method for preparing said coating composition and to an OBA premix useful in the method of preparing the coating composition, said premix comprising an OBA, a sugar alcohol, and optionally a colorant, wherein the OBA and sugar alcohol together make up at least 10% by weight, preferably at least 20% by weight, based on the total weight of solids in the premix.

Find Patent Forward Citations

Sokka, Tuula. (2026). Coating composition for paper and paperboard (U.S. Patent No. 12529190). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12529190

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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