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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 12546064 B1

PDFFull Text
Date of Patent:
Feb. 10, 2026

Filed:

May. 13, 2022

Multiply containerboard for use in corrugated board

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Isto Heiskanen, Imatra, FI;

Jukka Kankkunen, Imatra, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Abbas Rashid

Assistant Examiner:

Elisa H Vera

Int. Cl.
CPC ...
D21H 27/40 (2006.01); B32B 29/00 (2006.01); B32B 29/08 (2006.01); D21F 11/04 (2006.01); D21H 11/04 (2006.01); D21H 11/06 (2006.01); D21H 21/16 (2006.01); D21H 21/18 (2006.01); D21H 27/10 (2006.01); D21H 27/38 (2006.01);
U.S. Cl.
CPC ...
D21H 27/40 (2013.01); B32B 29/005 (2013.01); B32B 29/08 (2013.01); D21F 11/04 (2013.01); D21H 11/04 (2013.01); D21H 11/06 (2013.01); D21H 21/16 (2013.01); D21H 21/18 (2013.01); D21H 27/10 (2013.01); D21H 27/38 (2013.01); B32B 2250/03 (2013.01); B32B 2250/26 (2013.01); B32B 2553/00 (2013.01);
Abstract

The present invention relates to a multiply containerboard for use in corrugated board, said multiply containerboard comprising: a first outer ply, a second outer ply, and at least one intermediate ply sandwiched between the first and second outer ply, wherein said first and second outer ply comprise at least 70 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, and wherein said intermediate ply comprises at least 30 wt % unbleached kraft pulp based on dry weight and at least one cellulose based strength enhancement agent, and wherein said intermediate ply comprises less than 30 wt % NSSC pulp based on dry weight.

Find Patent Forward Citations

Heiskanen, Isto. (2026). Multiply containerboard for use in corrugated board (U.S. Patent No. 12546064). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12546064

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

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