Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/12: Pulping cellulose-containing materials (digesters D21C 7/00) with acids, acid salts, or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sodium bisulfite
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11834785 | Method of transforming high consistency pulp fibers into pre-dispersed semi-dry and dry fibrous materials | Sep 14, 17 | Dec 05, 23 | FPINNOVATIONS |
| 11554514 | Strong and tough structural wood materials, and methods for fabricating and use thereof | Aug 23, 21 | Jan 17, 23 | UNIVERSITY OF MARYLAND, COLLEGE PARK |
| 11535983 | Method for producing a fibrous material | May 18, 17 | Dec 27, 22 | Andritz AG |
| 11130256 | Strong and tough structural wood materials, and methods for fabricating and use thereof | Apr 09, 18 | Sep 28, 21 | UNIVERSITY OF MARYLAND, COLLEGE PARK |
| 10280559 | Process for producing increased bulk pulp fibers, pulp fibers obtained, and products incorporating same | Oct 25, 17 | May 07, 19 | International Paper Company |
| 8303772 | Method for preparing a grass-type unbleached paper product | Jul 25, 08 | Nov 06, 12 | Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd, Shangdong Fuyin Paper & Environmental Protection Technology Co., Ltd., |
| 5460697 | Method of pulping wood chips with a fungi using sulfite salt-treated wood chips | Jun 10, 94 | Oct 24, 95 | WISCONSIN ALUMNI RESEARCH FOUNDATION |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0166,427 | STRONG AND TOUGH STRUCTURAL WOOD MATERIALS, AND METHODS FOR FABRICATING AND USE THEREOF | Nov 04, 22 | Jun 01, 23 | Not available |
| 2020/0318,287 | METHOD OF PROVIDING A PAPER FIBRE COMPOSITION | May 17, 17 | Oct 08, 20 | Not available |
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