Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/20: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining
D21D 1/20
Sub-Class
Stats
- 56 US PATENTS IN FORCE
- 17 US APPLICATIONS PENDING
- 13 Total Patent Owners
- 183 TOTAL INVENTORS
Recent Patents
| 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. |
| 12227900 | High brightness non-wood pulp | Nov 05, 21 | Feb 18, 25 | Kimberly Clark Worldwide Inc. |
| 12163284 | Fiberboard manufacturing method and fiberboard | Mar 18, 20 | Dec 10, 24 | Nichiha Corporation |
| 12146262 | Non-wood pulp having high brightness and low debris | Nov 05, 21 | Nov 19, 24 | Kimberly Clark Worldwide Inc. |
| 12104327 | Tissues and paper towels incorporating surface enhanced pulp fibers and methods of making the same | Sep 23, 20 | Oct 01, 24 | Domtar Paper Company, LLC |
| 12037745 | Process for producing binderless formaldehyde-free fiberboard and coproducing fulvic acid from straw | Aug 19, 21 | Jul 16, 24 | DAHE (SHANGHAI) ECOLOGICAL TECHNOLOGY CO., LTD. |
| 11970817 | Paper filler composition | May 27, 22 | Apr 30, 24 | FIBERLEAN TECHNOLOGIES LIMITED |
| 11905657 | Method for producing cellulose nanofibers | Mar 18, 19 | Feb 20, 24 | DAIO PAPER CORPORATION |
| 11788229 | Monitoring and controlling of refining of fibrous pulp | May 02, 20 | Oct 17, 23 | Valmet Technologies, Inc. |
| 11746472 | Pulp mixture | Jun 20, 18 | Sep 05, 23 | BillerudKorsnas AB |
| 11732411 | Paper filler composition | Oct 01, 21 | Aug 22, 23 | FiberLean Technologies Limited |
| 11566376 | Method for preparing unbleached biomechanical pulp from straw | Apr 29, 19 | Jan 31, 23 | QILU UNIVERSITY OF TECHNOLOGY |
| 11535983 | Method for producing a fibrous material | May 18, 17 | Dec 27, 22 | Andritz AG |
| 11499269 | Method for production of filler loaded surface enhanced pulp fibers | Oct 18, 17 | Nov 15, 22 | Domtar Paper Company, LLC |
| 11441272 | Method to produce a paperboard, a paperboard and a corrugated board | Aug 30, 18 | Sep 13, 22 | Stora Enso Oyj |
| 11390991 | Addition of cellulose esters to a paper mill without substantial modifications | Jul 26, 19 | Jul 19, 22 | Eastman Chemical Company |
| 11390992 | Fiber processing device, fibrous feedstock recycling device, and control method of a fiber processing device | Jan 17, 19 | Jul 19, 22 | SEIKO EPSON CORPORATION |
| 11377791 | Paper filler composition | Aug 30, 18 | Jul 05, 22 | FiberLean Technologies Limited |
| 11299852 | Method for producing parenchymal cell cellulose | Dec 14, 16 | Apr 12, 22 | Betulium Oy |
| 11214925 | Method of preparing recycled cellulosic fibers to improve paper production | Mar 08, 21 | Jan 04, 22 | Pulmac Systems International, Inc. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0092,605 | LIQUID CRYSTAL POLYMER POWDER, LIQUID CRYSTAL POLYMER FILM, AND METHOD OF PRODUCING SAME | Nov 27, 24 | Mar 20, 25 | Not available |
| 2025/0059,708 | Adjusting Blade Gap in Processing Equipment for Processing Fibrous Material | Jan 05, 23 | Feb 20, 25 | VALMET TECHNOLOGIES OY |
| 2025/0059,712 | STRENGTH ENHANCEMENT AGENT FOR PAPER AND PAPERBOARD | Dec 12, 22 | Feb 20, 25 | Stora Enso Oyj |
| 2025/0027,270 | A method, uses of the same, a pulp composition, and a system | Aug 17, 22 | Jan 23, 25 | Not available |
| 2025/0012,010 | NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS | Sep 17, 24 | Jan 09, 25 | Not available |
| 2024/0344,274 | DISPERSIBLE PAPER, METHOD FOR PRODUCING SAME, PACKAGING AND USE OF SAID PAPER | Jun 30, 22 | Oct 17, 24 | Not available |
| 2024/0240,400 | PAPER FILLER COMPOSITION | Mar 28, 24 | Jul 18, 24 | FiberLean Technologies Limited |
| 2024/0122,231 | IMPROVED WRAPPING PAPER HAVING A LOW DIFFUSION CAPACITY | Feb 16, 22 | Apr 18, 24 | Not available |
| 2023/0407,568 | Pulp Mixture | Jul 18, 23 | Dec 21, 23 | Not available |
| 2021/0180,252 | FIBER BLEND, METHOD FOR PRODUCING FIBER BLEND, AND PAPERBOARD PRODUCT COMPRISING FIBER BLEND | Feb 24, 21 | Jun 17, 21 | WestRock MWV, LLC |
| 2020/0407,912 | METHOD FOR PRODUCING CELLULOSE NANOFIBERS | Mar 18, 19 | Dec 31, 20 | DAIO PAPER CORPORATION |
| 2020/0063,342 | ADDITION OF CELLULOSE ESTERS TO A PAPER MILL WITHOUT SUBSTANTIAL MODIFICATIONS | Jul 26, 19 | Feb 27, 20 | Eastman Chemical Company |
| 2020/0048,833 | FIBER BLEND, METHOD FOR PRODUCING FIBER BLEND, AND PAPERBOARD PRODUCT COMPRISING FIBER BLEND | Aug 08, 19 | Feb 13, 20 | Not available |
| 2019/0218,714 | FIBER PROCESSING DEVICE, FIBROUS FEEDSTOCK RECYCLING DEVICE, AND CONTROL METHOD OF A FIBER PROCESSING DEVICE | Jan 17, 19 | Jul 18, 19 | SEIKO EPSON CORPORATION |
| 2018/0237,990 | METHOD AND APPARATUS FOR PRODUCING MICROFIBRILLATED CELLULOSE FIBER | Aug 23, 16 | Aug 23, 18 | Not available |
| 2017/0145,634 | COMPOSITE PAPER PULP COMPOSITION AND METHOD OF MAKING | Nov 25, 15 | May 25, 17 | VERSO CORPORATION |
| 2016/0102,433 | A METHOD AND A DEVICE FOR PRODUCING NANOFIBRILLAR CELLULOSE | May 13, 14 | Apr 14, 16 | UPM-KYMMENE CORPORATION |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 32 Months (last 2 years Issuances)
- 32 Months (last 5 years Issuances)