Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 1/04: Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) with acid reacting compounds
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12234602 | Apparatuses, methods and systems for yield increase in a kraft cooking plant | May 17, 22 | Feb 25, 25 | Bracell Bahia Specialty Cellulose SA |
| 12139853 | Reactor discharge | Apr 10, 19 | Nov 12, 24 | Valmet AB |
| 12123138 | Arylsulfonic acid—modified sulfuric acid and uses thereof | Aug 20, 21 | Oct 22, 24 | SixRing Inc. |
| 12024821 | Modified sulfuric acid and uses thereof | Aug 20, 21 | Jul 02, 24 | SixRing Inc. |
| 12005418 | Reactor vessel for biomass material | Mar 29, 19 | Jun 11, 24 | Valmet AB |
| 11866753 | Methods of processing lignocellulosic biomass using single-stage autohydrolysis and enzymatic hydrolysis with C5 bypass and post-hydrolysis | May 25, 21 | Jan 09, 24 | Inbicon A/S |
| 11661704 | Dissolving wood pulps and methods of making and using the same | Jul 29, 21 | May 30, 23 | GP Cellulose GMbH |
| 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 |
| 11492752 | Method and device for treating biomass | May 02, 18 | Nov 08, 22 | Valmet AB |
| 11371186 | Method and system for treating biomass | Dec 07, 17 | Jun 28, 22 | Valmet AB |
| 11332768 | Methods for hydrolysing lignocellulosic material | Jul 10, 15 | May 17, 22 | LEAF SCIENCES PTY LTD |
| 11299850 | Converting lignocellulosic biomass to glucose using a low temperature sulfur dioxide pretreatment | Nov 09, 18 | Apr 12, 22 | Iogen Corporation |
| 11193177 | Process for recovering higher sugar from biomass | Jun 25, 19 | Dec 07, 21 | Indian Oil Corporation Limited; Department of Biotechnology; |
| 11118203 | Methods of processing lignocellulosic biomass using single-stage autohydrolysis and enzymatic hydrolysis with C5 bypass and post-hydrolysis | Aug 01, 13 | Sep 14, 21 | Inbicon A/S |
| 11118308 | Treatment of lignocellulosic biomass with ionic liquid | Apr 05, 18 | Sep 14, 21 | IP2IPO Innovations Limited |
| 11105042 | Dissolving wood pulps and methods of making and using the same | Feb 25, 19 | Aug 31, 21 | GP Cellulose GMbH |
| 11008598 | Process comprising acid pretreatment and enzymatic hydrolysis | Mar 16, 16 | May 18, 21 | Iogen Corporation |
| 10995314 | Sulfur dioxide and/or sulfurous acid pretreatment with sulfur dioxide recovery | Mar 16, 16 | May 04, 21 | Iogen Corporation |
| 10947669 | Method for recovering concentrated hydrolysate after hydrolysis of cellulose material | Feb 16, 16 | Mar 16, 21 | Valmet AB |
| 10889674 | Method of preparing a grafted copolymer of lignin and/or cellulose | Aug 24, 17 | Jan 12, 21 | BIOFIBER TECH SWEDEN AB |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0034,806 | REACTOR DISCHARGE | Oct 11, 24 | Jan 30, 25 | Valmet AB |
| 2024/0309,585 | MODIFIED SULFURIC ACID AND USES THEREOF | May 22, 24 | Sep 19, 24 | Not available |
| 2024/0295,074 | METHODS FOR PRODUCING PULP AND PAPER PRODUCTS FROM PLANTS HAVING BAST AND HURD FIBERS | Dec 30, 21 | Sep 05, 24 | Not available |
| 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 |
| 2024/0102,064 | METHODS OF PROCESSING LIGNOCELLULOSIC BIOMASS USING SINGLE-STAGE AUTOHYDROLYSIS AND ENZYMATIC HYDROLYSIS WITH C5 BYPASS AND POST-HYDROLYSIS | Nov 29, 23 | Mar 28, 24 | Inbicon A/S |
| 2023/0043,719 | METHOD AND SYSTEM FOR TREATING BIOMASS | Oct 01, 20 | Feb 09, 23 | Valmet AB |
| 2021/0285,155 | METHODS OF MAKING SPECIALIZED CELLULOSE AND OTHER PRODUCTS FROM BIOMASS | Nov 07, 18 | Sep 16, 21 | Not available |
| 2021/0131,031 | PROCESSES AND SYSTEMS FOR BIOMASS IMPREGNATION TO IMPROVE CONVERSION TO SUGARS, CHEMICALS, FUELS, AND MATERIALS | Oct 10, 20 | May 06, 21 | Not available |
| 2021/0040,688 | METHOD OF PRODUCING DISSOLVING PULP | Mar 06, 19 | Feb 11, 21 | Not available |
| 2019/0194,866 | METHOD FOR PRODUCING CELLULOSE FINE FIBER | Mar 28, 17 | Jun 27, 19 | KRI, INC. |
| 2018/0016,607 | CONTROLLING THE PRETREATMENT OF A SOFTWOOD STARTING MATERIAL | Jan 20, 16 | Jan 18, 18 | SEKAB E-TECHNOLOGY AB |
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