Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/16: Pulping cellulose-containing materials (digesters D21C 7/00) with acids, acid salts, or acid anhydrides nitrogen oxides; nitric acid
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11479913 | Fiber production with supercritical fluid phase from cotton straw | Feb 13, 19 | Oct 25, 22 | Not available |
| 10947670 | Drying/transportation and releasing MFC | Apr 07, 17 | Mar 16, 21 | Stora Enso Oyj |
| 8268124 | Method for production of pulp | Jan 15, 08 | Sep 18, 12 | Kabushiki Kaisha Toa Kogyo, Nihon Cellulose Co., Ltd., |
| 7396434 | Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein | Jun 03, 04 | Jul 08, 08 | PURE LIGNIN ENVIRONMENTAL TECHNOLOGY LTD. |
| 5628830 | Enzymatic hydrolysis of biomass material | Jun 06, 95 | May 13, 97 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA |
| 5536325 | Method of treating biomass material | Jun 06, 94 | Jul 16, 96 | Not available |
| 5366558 | Method of treating biomass material | Jun 08, 93 | Nov 22, 94 | Not available |
| 5221357 | Method of treating biomass material | Mar 28, 91 | Jun 22, 93 | Not available |
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