Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/26: Pulping cellulose-containing materials (digesters D21C 7/00) Other features of pulping processes Multi-stage processes
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12258714 | Aramid pulp and method for manufacturing the same | Dec 24, 20 | Mar 25, 25 | Kolon Industries Inc. |
| 12195919 | Multi-step low temperature and low pressure process for agricultural feedstock stock preparation with hemicellulose and lignin recovery | Nov 17, 22 | Jan 14, 25 | KANBOL, INC. |
| 11993895 | Method of feeding wood chips to a prehydrolysis reactor | Oct 02, 19 | May 28, 24 | Andritz Oy |
| 11939721 | Method for non-catalytic delignification of biomass inside an apparatus | Jan 13, 20 | Mar 26, 24 | LIGNOPURA AGROTECH PVT LTD. |
| 11814790 | Dec 15, 18 | Nov 14, 23 | EXEGI IP MANAGEMENT B.V. | |
| 11773420 | Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars | Feb 08, 21 | Oct 03, 23 | versalis S.p.A. |
| 11512334 | Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars | Dec 08, 20 | Nov 29, 22 | DSM IP Assets B. V. |
| 11371185 | Outlet system for transporting comminuted lignocellulosic material from a vessel and vessel comprising such an outlet system | Oct 28, 19 | Jun 28, 22 | Valmet AB |
| 11352746 | Processes and systems for the pulping of lignocellulosic materials | May 27, 20 | Jun 07, 22 | Andritz, Inc. |
| 11066784 | Method for manufacturing dissolving pulp | Dec 21, 17 | Jul 20, 21 | SÖDRA SKOGSÄGARNA EKONOMISK FÖRENING |
| 10995453 | Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same | Feb 18, 20 | May 04, 21 | GP Cellulose GMbH |
| 10947669 | Method for recovering concentrated hydrolysate after hydrolysis of cellulose material | Feb 16, 16 | Mar 16, 21 | Valmet AB |
| 10947573 | Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars | May 09, 19 | Mar 16, 21 | DSM IP Assets B. V. |
| 10907303 | Biomass, thermal pressure hydrolysis and anaerobic digestion | Dec 19, 16 | Feb 02, 21 | THERMO PRESSURE TECHNOLOGIES LIMITED |
| 10907183 | Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars | Jul 31, 19 | Feb 02, 21 | DSM IP Assets B. V. |
| 10865519 | Modified cellulose from chemical fiber and methods of making and using the same | Nov 13, 17 | Dec 15, 20 | GP Cellulose GMbH |
| 10724174 | Processes and systems for the pulping of lignocellulosic materials | Mar 11, 16 | Jul 28, 20 | Andritz, Inc. |
| 10597689 | Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars | Oct 29, 18 | Mar 24, 20 | DSM IP Assets B. V. |
| 10597819 | Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same | May 18, 18 | Mar 24, 20 | GP Cellulose GMbH |
| 10513824 | Method for reducing pulp viscosity in production of dissolving pulp | May 26, 16 | Dec 24, 19 | Kemira Oyj |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0101,683 | LOW TEMPERATURE AND LOW PRESSURE PROCESS FOR AGRICULTURAL FEEDSTOCK PREPARATION | Dec 06, 24 | Mar 27, 25 | Not available |
| 2025/0052,002 | OPTIMIZATION OF CHEMICAL CONSUMPTION IN BIOMASS DELIGNIFICATION | Feb 09, 24 | Feb 13, 25 | Not available |
| 2024/0410,109 | A METHOD FOR CHEMICAL PULP PRODUCTION IN A MULTI-STAGE PROCESS | Oct 06, 22 | Dec 12, 24 | ANDRITZ AB |
| 2024/0401,270 | PROCESS FOR TREATMENT OF BIOMASS FOR PULPING AND BIOREFINERY APPLICATIONS | Sep 26, 22 | Dec 05, 24 | Not available |
| 2024/0175,206 | METHOD FOR PRODUCING PRODUCTS BASED ON NON-WOODY BIOMASS AS RAW MATERIAL | Dec 29, 21 | May 30, 24 | Not available |
| 2024/0052,566 | Optimization Of Chemical Consumption in Biomass Delignification | Aug 10, 23 | Feb 15, 24 | Not available |
| 2023/0160,141 | EXTRACTION OF DELIGNIFIED, CELLULOSE-BASED FIBERS FROM NATURAL PLANT MATERIAL, AND MATERIALS INCORPORATING SUCH FIBERS | Apr 21, 21 | May 25, 23 | Not available |
| 2021/0079,593 | Dissolution of Cellulose in Ionic Liquids | Jan 17, 19 | Mar 18, 21 | Not available |
| 2019/0301,094 | PROCESS OF PRODUCING FIBRILLATED NANOCELLULOSE WITH LOW ENERGY CONSUMPTION | Nov 23, 17 | Oct 03, 19 | FIBRIA CELULOSE S.A. |
| 2018/0105,982 | PROCESSES AND SYSTEMS FOR THE PULPING OF LIGNOCELLULOSIC MATERIALS | Mar 11, 16 | Apr 19, 18 | Not available |
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