Class D21C : PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
Subclass 3/02: Pulping cellulose-containing materials (digesters D21C 7/00) with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
| 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 |
| 12227900 | High brightness non-wood pulp | Nov 05, 21 | Feb 18, 25 | Kimberly Clark Worldwide Inc. |
| 12221382 | High temperature hydrator | May 19, 21 | Feb 11, 25 | Carbon Engineering ULC |
| 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. |
| 12188180 | Purified medicinal cannabis non-hemp hurd fiber, and articles containing the same | Jan 26, 21 | Jan 07, 25 | Not available |
| 12172112 | Method for making an adsorptive air filter | Aug 19, 24 | Dec 24, 24 | IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY |
| 12146262 | Non-wood pulp having high brightness and low debris | Nov 05, 21 | Nov 19, 24 | Kimberly Clark Worldwide Inc. |
| 12102947 | Biodegradable air filter from date palm and method of fabrication thereof | May 16, 24 | Oct 01, 24 | IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY |
| 12098506 | Method of forming glass-like sheets using date palm seeds | Feb 15, 24 | Sep 24, 24 | KING FAISAL UNIVERSITY |
| 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 |
| 12049727 | Process for separation of the cellulosic part from a polyester and cellulose composition | Jul 08, 19 | Jul 30, 24 | SÖDRA SKOGSÄGARNA EKONOMISK FÖRENING |
| 12024823 | Process for refining fiber and deriving chemical co-products from biomass | Jan 07, 22 | Jul 02, 24 | Not available |
| 11976416 | Continuous process for production of cellulose pulp from grass-like feedstock | Jul 28, 21 | May 07, 24 | Not available |
| 11932989 | Process for producing refined cotton with high polymerization degree | Aug 10, 22 | Mar 19, 24 | HUBEI JINHANJIANG REFINED COTTON CO., LTD. |
| 11834783 | Integrated kraft pulp mill and thermochemical conversion system | Mar 31, 22 | Dec 05, 23 | Canfor Pulp Ltd.; Licella Pty Ltd.; |
| 11814790 | Dec 15, 18 | Nov 14, 23 | EXEGI IP MANAGEMENT B.V. | |
| 11788228 | Methods for processing lignocellulosic material | Feb 13, 18 | Oct 17, 23 | CMBlu Energy AG |
| 11692000 | Methods of making specialized lignin and lignin products from biomass | Dec 21, 20 | Jul 04, 23 | Apalta Patents OÜ |
| 11661704 | Dissolving wood pulps and methods of making and using the same | Jul 29, 21 | May 30, 23 | GP Cellulose GMbH |
| 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 |
| 2025/0012,010 | NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS | Sep 17, 24 | Jan 09, 25 | Not available |
| 2024/0426,050 | A method, use of the same, a pulp composition, and a system | Aug 17, 22 | Dec 26, 24 | Not available |
| 2024/0344,270 | METHODS OF INCREASING FORMABILITY OF A PALM SHEATH MATERIAL, METHODS OF PRODUCING A PALM SHEATH-BASED PRODUCT, AND PALM SHEATH FOODWARE PRODUCED THEREBY | Apr 11, 24 | Oct 17, 24 | Not available |
| 2024/0337,069 | HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF | Jun 20, 22 | Oct 10, 24 | Not available |
| 2024/0328,083 | METHOD FOR PREPARING FLUFF PULP FROM BAMBOOS AND FLUFF PULP PREPARED THEREBY | Oct 31, 22 | Oct 03, 24 | SOUTH CHINA UNIVERSITY OF TECHNOLOGY |
| 2024/0309,586 | A METHOD FOR PRODUCING A CHEMI-THERMOMECHANICAL FIBROUS PULP FROM NON-WOOD PLANT RAW MATERIALS AND AN AUTOMATED LINE FOR PRODUCING SAID PULP BY SAID METHOD | Mar 22, 23 | Sep 19, 24 | Not available |
| 2024/0301,622 | PROCESS TO OBTAIN FULLY OXIDIZED WHITE LIQUOR FOR USE IN THE FIBERLINE OF A KRAFT PULP PROCESS | Mar 06, 24 | Sep 12, 24 | L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude |
| 2024/0263,393 | PROCESS OF USING NON-WOOD FIBERS TO CREATE PAPER PULP | Jan 12, 24 | Aug 08, 24 | Not available |
| 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. |
| 2024/0131,489 | Process and System for Producing Pulp, Energy, and Bioderivatives from Plant-Based and Recycled Materials | Jun 12, 16 | Apr 25, 24 | Not available |
| 2024/0124,986 | METHOD FOR PRODUCING ALKALI METAL/ALKALINE EARTH METAL HYDROXIDE AND APPLICATION OF SAID PRODUCTION METHOD TO CARBOXYLATE WASTE RECYCLING TECHNOLOGY | Feb 21, 22 | Apr 18, 24 | TOHOKU UNIVERSITY |
| 2024/0102,238 | PROCESS FOR PRODUCING AND USING FIBRILLATED BIODEGRADABLE MICROFIBERS | Sep 22, 23 | Mar 28, 24 | Not available |
| 2024/0102,241 | INTEGRATED KRAFT PULP MILL AND THERMOCHEMICAL CONVERSION SYSTEM | Nov 02, 23 | Mar 28, 24 | Canfor Pulp Ltd.; Licella Pty Ltd.; |
| 2024/0084,507 | PULP FOR JUNCAO SPINNING AND PREPARATION METHOD AND USE THEREOF | Mar 20, 23 | Mar 14, 24 | Not available |
| 2023/0166,427 | STRONG AND TOUGH STRUCTURAL WOOD MATERIALS, AND METHODS FOR FABRICATING AND USE THEREOF | Nov 04, 22 | Jun 01, 23 | Not available |
| 2023/0046,123 | PROCESS FOR PRODUCING REFINED COTTON WITH HIGH POLYMERIZATION DEGREE | Aug 10, 22 | Feb 16, 23 | HUBEI JINHANJIANG REFINED COTTON CO., LTD. |
| 2022/0290,376 | FLUFF PULP | Sep 03, 20 | Sep 15, 22 | Stora Enso Oyj |
| 2022/0074,139 | Pulping Methods, Methods for Manufacturing Paperboard, and Paperboard Structures | Sep 08, 21 | Mar 10, 22 | Not available |
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