Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/22: Pulping cellulose-containing materials (digesters D21C 7/00) Other features of pulping processes
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12234604 | Modified sulfuric acid and uses thereof | Mar 18, 24 | Feb 25, 25 | SixRing Inc. |
| 12227900 | High brightness non-wood pulp | Nov 05, 21 | Feb 18, 25 | Kimberly Clark Worldwide Inc. |
| 12221747 | Method for separating biomass components by ternary system | Nov 01, 22 | Feb 11, 25 | QILU UNIVERSITY OF TECHNOLOGY |
| 12152110 | Lignocellulosic biomass treatment method | Dec 04, 18 | Nov 26, 24 | IFP Energies Nouvelles; INSTITUT NATIONAL DE RECHERCHE POUR L'AGRICULTURE, L'ALIMENTATION ET L'ENVIRONMENT; AGRO INDUSTRIES RECHERCHE ET DEVELOPPEMENT; |
| 12146262 | Non-wood pulp having high brightness and low debris | Nov 05, 21 | Nov 19, 24 | Kimberly Clark Worldwide Inc. |
| 12077911 | Predictive control system and method for brown washing treatment in pulp mills | Nov 13, 20 | Sep 03, 24 | Buckman Laboratories International, Inc. |
| 12071725 | Juncao pulp for spinning and preparation method and use thereof | Mar 20, 23 | Aug 27, 24 | XINXIANG CHEMICAL FIBRE CO., LTD. |
| 12060679 | Lignocellulosic composites prepared with aqueous alkaline and urea solutions in cold temperatures systems | Mar 25, 21 | Aug 13, 24 | Bradley University |
| 12039239 | Method for obtaining information on quality of combustion of a liquor in a chemical recovery boiler and a method for controlling a chemical recovery boiler | Feb 24, 21 | Jul 16, 24 | VALMET AUTOMATION OY |
| 12031269 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Jul 09, 24 | SixRing Inc. |
| 11970816 | Dual surfactant digester additive composition and a method for enhancing the pulping of wood chips using the same | Aug 11, 21 | Apr 30, 24 | Chemstone Inc. |
| 11965289 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Apr 23, 24 | SixRing Inc. |
| 11932989 | Process for producing refined cotton with high polymerization degree | Aug 10, 22 | Mar 19, 24 | HUBEI JINHANJIANG REFINED COTTON CO., LTD. |
| 11905655 | Black liquor viscosity reducing and anti-scale agent | Jul 29, 20 | Feb 20, 24 | ECOLAB USA INC. |
| 11851815 | Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials | Oct 26, 21 | Dec 26, 23 | Pierson Capital Environmental (Beijing) Limited |
| 11549214 | Processes, methods, and systems for chemo-mechanical cellular explosion and solid and liquid products made by the same | Aug 11, 20 | Jan 10, 23 | IFG Technologies, LLC |
| 11512426 | Process for obtaining cellulose | Jul 25, 14 | Nov 29, 22 | Not available |
| 11486094 | Method to convert mechanical pulp derived waste material into value added cellulose products | Feb 01, 18 | Nov 01, 22 | Aalto University Foundation sr |
| 11473241 | Method of producing chemical pulp | May 15, 18 | Oct 18, 22 | Andritz Oy |
| 11390990 | Phenols as additives in kraft pulping | Oct 17, 18 | Jul 19, 22 | Auburn University |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0075,425 | PROCESSES FOR FRACTIONATION OF BIOMASS | Jun 28, 24 | Mar 06, 25 | Not available |
| 2025/0052,002 | OPTIMIZATION OF CHEMICAL CONSUMPTION IN BIOMASS DELIGNIFICATION | Feb 09, 24 | Feb 13, 25 | Not available |
| 2025/0012,010 | NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS | Sep 17, 24 | Jan 09, 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 |
| 2024/0318,381 | MODIFIED SULFURIC ACID AND USES THEREOF | Jun 06, 24 | Sep 26, 24 | Not available |
| 2024/0247,439 | SCALE INHIBITION FOR PULP DIGESTERS | Jan 11, 24 | Jul 25, 24 | ECOLAB USA INC. |
| 2024/0226,841 | Process and System for Producing Pulp, Energy, and Bioderivatives from Plant-Based and Recycled Materials | Jun 13, 16 | Jul 11, 24 | Not available |
| 2024/0175,205 | METHOD FOR DIGESTING LIGNOCELLULOSIC MATERIAL | Nov 28, 23 | May 30, 24 | Solenis Technologies, L.P. |
| 2024/0150,961 | BLACK LIQUOR VISCOSITY REDUCING AND ANTI-SCALE AGENT | Jan 17, 24 | May 09, 24 | ECOLAB USA INC. |
| 2024/0141,587 | PROCESSES, METHODS, AND SYSTEMS FOR CHEMO-MECHANICAL CELLULAR EXPLOSION AND SOLID AND LIQUID PRODUCTS MADE BY THE SAME | Jan 10, 24 | May 02, 24 | Not available |
| 2024/0131,489 | Process and System for Producing Pulp, Energy, and Bioderivatives from Plant-Based and Recycled Materials | Jun 12, 16 | Apr 25, 24 | Not available |
| 2024/0116,835 | LIGNOCELLULOSE REFINERY | Oct 28, 21 | Apr 11, 24 | Not available |
| 2024/0084,507 | PULP FOR JUNCAO SPINNING AND PREPARATION METHOD AND USE THEREOF | Mar 20, 23 | Mar 14, 24 | Not available |
| 2024/0052,566 | Optimization Of Chemical Consumption in Biomass Delignification | Aug 10, 23 | Feb 15, 24 | Not available |
| 2023/0160,140 | PROCESS FOR INCREASING DIGESTION EFFICIENCY OF LIGNOCELLULOSIC MATERIAL IN A TREATMENT VESSEL | Nov 22, 22 | May 25, 23 | Solenis Technologies, L.P. |
| 2023/0081,586 | ADJUSTING A HIGH PRESSURE FEEDER BASED ON FLUID LEAKAGE | Mar 03, 21 | Mar 16, 23 | Not available |
| 2023/0061,654 | COOKING ACCELERATOR FOR LIGNOCELLULOSE MATERIALS AND METHOD FOR PRODUCING PULP USING SAME | Aug 03, 20 | Mar 02, 23 | Nicca Chemical Co. Ltd. |
| 2020/0123,707 | METHOD OF INCREASING THE THROUGHPUT AND/OR DECREASING ENERGY USAGE OF A PULPING PROCESS | Jun 12, 18 | Apr 23, 20 | Not available |
| 2019/0276,983 | METHOD AND SYSTEM FOR PROVIDING CUSTOMIZED BIOPROCESSING CONDITIONS FOR FEEDSTOCK | May 29, 19 | Sep 12, 19 | Not available |
| 2018/0119,345 | PROCESS FOR PRODUCING A PULP | Dec 28, 17 | May 03, 18 | Not available |
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