Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/00: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F)
D21D 1/00
Sub-Class
Stats
- 37 US PATENTS IN FORCE
- 13 US APPLICATIONS PENDING
- 10 Total Patent Owners
- 123 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12215462 | Refiner | Jan 24, 22 | Feb 04, 25 | Aikawa Iron Works Co. Ltd. |
| 12104324 | Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same | Aug 30, 22 | Oct 01, 24 | Domtar Paper Company, LLC |
| 12091819 | Arrangement and method for adjusting blade gap in refiner | Dec 08, 20 | Sep 17, 24 | VALMET TECHNOLOGIES OY |
| 12043959 | Method for controlling a device for treating high-consistency pulp | Jan 09, 20 | Jul 23, 24 | Voith Patent GmbH |
| 11982054 | Apparatus and method for processing wood fibers | Aug 22, 22 | May 14, 24 | International Paper Company |
| 11965290 | Apparatus and method for processing wood fibers | May 10, 21 | Apr 23, 24 | International Paper Company |
| 11905658 | Apparatus and method for processing wood fibers | Oct 06, 20 | Feb 20, 24 | International Paper Company |
| 11846069 | Refiner segment | May 02, 19 | Dec 19, 23 | Valmet AB |
| 11834785 | Method of transforming high consistency pulp fibers into pre-dispersed semi-dry and dry fibrous materials | Sep 14, 17 | Dec 05, 23 | FPINNOVATIONS |
| 11819858 | Refiner plate segments having feeding grooves | Feb 05, 20 | Nov 21, 23 | Andritz, Inc. |
| 11788229 | Monitoring and controlling of refining of fibrous pulp | May 02, 20 | Oct 17, 23 | Valmet Technologies, Inc. |
| 11572658 | Grinding method and grinding medium | Jan 16, 20 | Feb 07, 23 | FiberLean Technologies Limited |
| 11453977 | Set for the mechanical processing, in particular grinding of suspended fibrous material | Mar 30, 18 | Sep 27, 22 | Andritz Fiedler Gmbh |
| 11440017 | Steam evacuation in a pulp or fiber refiner | Feb 08, 18 | Sep 13, 22 | Valmet AB |
| 11441271 | Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same | Feb 05, 19 | Sep 13, 22 | Domtar Paper Company, LLC; Miami University; |
| 11421382 | Apparatus and method for processing wood fibers | Jun 28, 19 | Aug 23, 22 | International Paper Company |
| 11174592 | Disperser plates with intermeshing teeth and outer refining section | Mar 22, 19 | Nov 16, 21 | Andritz, Inc. |
| 11001968 | Apparatus and method for processing wood fibers | Jan 02, 18 | May 11, 21 | International Paper Company |
| 10982387 | Process for the production of nano-fibrillar cellulose suspensions | Apr 11, 19 | Apr 20, 21 | FiberLean Technologies Limited |
| 10876255 | Processing device, sheet manufacturing device, processing method, and method for manufacturing sheet | Apr 16, 18 | Dec 29, 20 | SEIKO EPSON CORPORATION |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0059,708 | Adjusting Blade Gap in Processing Equipment for Processing Fibrous Material | Jan 05, 23 | Feb 20, 25 | VALMET TECHNOLOGIES OY |
| 2024/0410,111 | A Method for Treating Textile Fibers of Different Lengths | Nov 24, 22 | Dec 12, 24 | VALMET TECHNOLOGIES OY |
| 2024/0392,501 | Deflaking Element for Pulper | May 24, 23 | Nov 28, 24 | Not available |
| 2024/0360,622 | APPARATUS AND METHOD FOR PROCESSING WOOD FIBERS | Feb 19, 24 | Oct 31, 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 |
| 2024/0296,736 | REFINER | Apr 26, 24 | Sep 05, 24 | Not available |
| 2024/0295,076 | APPARATUS AND METHOD FOR PROCESSING WOOD FIBERS | May 13, 24 | Sep 05, 24 | Not available |
| 2024/0247,441 | APPARATUS AND METHOD FOR PROCESSING WOOD FIBERS | Apr 03, 24 | Jul 25, 24 | Not available |
| 2023/0243,097 | CONTROLLING THE TREATMENT OF FIBROUS MATERIAL | Mar 29, 23 | Aug 03, 23 | Voith Patent GmbH |
| 2022/0034,034 | DISPERSER PLATES WITH INTERMESHING TEETH AND OUTER REFINING SECTION | Oct 15, 21 | Feb 03, 22 | Andritz, Inc. |
| 2021/0017,705 | APPARATUS AND METHOD FOR PROCESSING WOOD FIBERS | Oct 06, 20 | Jan 21, 21 | Not available |
| 2019/0316,295 | APPARATUS AND METHOD FOR PROCESSING WOOD FIBERS | Jun 28, 19 | Oct 17, 19 | Not available |
| 2002/0060,028 | Device for diluting fibrous stock | Sep 18, 01 | May 23, 02 | VOITH PATENT GMBH |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 31 Months (last 2 years Issuances)
- 31 Months (last 5 years Issuances)