Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/00: Pulping cellulose-containing materials (digesters D21C 7/00)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12252844 | Approach to biomass delignification | Aug 18, 21 | Mar 18, 25 | SixRing Inc. |
| 12234604 | Modified sulfuric acid and uses thereof | Mar 18, 24 | Feb 25, 25 | SixRing Inc. |
| 12221747 | Method for separating biomass components by ternary system | Nov 01, 22 | Feb 11, 25 | QILU UNIVERSITY OF TECHNOLOGY |
| 12195782 | Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products | Feb 17, 22 | Jan 14, 25 | GranBio Intellectual Property Holdings, LLC |
| 12123138 | Arylsulfonic acid—modified sulfuric acid and uses thereof | Aug 20, 21 | Oct 22, 24 | SixRing Inc. |
| 12091818 | Processes for producing nanocellulose, and nanocellulose compositions produced therefrom | Mar 23, 21 | Sep 17, 24 | GranBio Intellectual Property Holdings, LLC |
| 12084811 | Lignocellulosic biomass based process for production of lignins and syngas, and electricity production efficient syngas | Feb 14, 19 | Sep 10, 24 | Société Bioeb |
| 12077910 | Nanocellulose production co-located at a pulp and paper mill | May 17, 21 | Sep 03, 24 | GranBio Intellectual Property Holdings, LLC |
| 12071725 | Juncao pulp for spinning and preparation method and use thereof | Mar 20, 23 | Aug 27, 24 | XINXIANG CHEMICAL FIBRE CO., LTD. |
| 12065780 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Aug 20, 24 | SixRing Inc. |
| 12031269 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Jul 09, 24 | SixRing Inc. |
| 12024821 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Jul 02, 24 | SixRing Inc. |
| 11982051 | Temperature-controlled delignification of biomass | Jun 16, 22 | May 14, 24 | SixRing Inc. |
| 11982052 | Combination approach to delignification of biomass under ambient conditions | Aug 17, 21 | May 14, 24 | SixRing 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. |
| 11932988 | Foam-based manufacturing system and process | Dec 30, 20 | Mar 19, 24 | Kimberly Clark Worldwide Inc. |
| 11905656 | Approach to biomass delignification | Aug 18, 21 | Feb 20, 24 | SixRing 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 |
| 11834523 | Nanolignocellulose compositions and processes to produce these compositions | Jan 06, 21 | Dec 05, 23 | GranBio Intellectual Property Holdings, LLC |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0075,425 | PROCESSES FOR FRACTIONATION OF BIOMASS | Jun 28, 24 | Mar 06, 25 | Not available |
| 2025/0059,707 | NANOCELLULOSE PRODUCTION CO-LOCATED AT A PULP AND PAPER MILL | Aug 30, 24 | Feb 20, 25 | Not available |
| 2024/0318,381 | MODIFIED SULFURIC ACID AND USES THEREOF | Jun 06, 24 | Sep 26, 24 | Not available |
| 2024/0309,585 | MODIFIED SULFURIC ACID AND USES THEREOF | May 22, 24 | Sep 19, 24 | Not available |
| 2024/0295,073 | MODIFIED SULFURIC ACID AND USES THEREOF | May 13, 24 | Sep 05, 24 | Not available |
| 2024/0263,394 | MODIFIED SULFURIC ACID AND USES THEREOF | Apr 17, 24 | Aug 08, 24 | Not available |
| 2024/0247,438 | APPROACH TO BIOMASS DELIGNIFICATION | Feb 12, 24 | Jul 25, 24 | Not available |
| 2024/0175,205 | METHOD FOR DIGESTING LIGNOCELLULOSIC MATERIAL | Nov 28, 23 | May 30, 24 | Solenis Technologies, L.P. |
| 2024/0175,204 | Foam-Based Manufacturing System and Process | Feb 05, 24 | May 30, 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 |
| 2023/0074,870 | FOAM-BASED MANUFACTURING SYSTEM AND PROCESS | Dec 30, 20 | Mar 09, 23 | Not available |
| 2023/0002,971 | METHOD AND PLANT FOR OBTAINING CELLULOSE FIBRES | Nov 27, 20 | Jan 05, 23 | LEINICH BETEILIGUNGEN GMBH |
| 2022/0267,953 | MODIFIED SULFURIC ACID AND USES THEREOF | Aug 20, 21 | Aug 25, 22 | Not available |
| 2022/0250,818 | Container for Containing Cellulose Resin Composition and Package Comprising Same and Cellulose Resin Composition | May 21, 20 | Aug 11, 22 | Asahi Kasei Kabushiki Kaisha |
| 2022/0018,065 | METHOD OF PRODUCING HOLOCELLULOSE AND PAPER STRENGTH AGENT, PROCESS FOR THE PRODUCTION OF PAPER, THE PAPER PRODUCED AND USE OF THE PRODUCED PAPER | Nov 15, 19 | Jan 20, 22 | Not available |
| 2021/0002,824 | A LOW ENERGY PRODUCTION PROCESS FOR PRODUCING PAPER PULP FROM LIGNOCELLULOSIC BIOMASS | Dec 13, 18 | Jan 07, 21 | Not available |
| 2020/0256,013 | METHOD FOR EXTRACTING BIOMASS | Feb 20, 20 | Aug 13, 20 | CH-Bioforce Oy |
| 2020/0208,346 | METHOD FOR PRODUCING DENSIFIED CELLULOSIC COMPOSITE MATERIAL | Apr 12, 18 | Jul 02, 20 | ETH Zurich; EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt; |
| 2019/0226,142 | Method for improved pulping using an environmentally friendly pulping aid | Jan 19, 18 | Jul 25, 19 | Not available |
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