D21D 1/004
Methods of beating or refining including disperging or deflaking
Official title: {Methods of beating or refining including disperging or deflaking}
D21D1/004 (Methods of beating or refining including disperging or deflaking) appears on 60 US grants and 58 published applications in this corpus.
Search patents in D21D- Granted patents
- 60
- Published applications
- 58
- Assignees
- 26
- Inventors
- 77
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 2 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 3 | 4 |
| 2008 | 2 | 1 |
| 2009 | 2 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 5 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 5 |
| 2020 | 2 | 3 |
| 2021 | 3 | 3 |
| 2022 | 3 | 5 |
| 2023 | 5 | 4 |
| 2024 | 7 | 8 |
| 2025 | 3 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Deflaking element for pulper10 Mar 2026US 12,571,161 B2Kadant Black Clawson LLC
- Apparatus and method for processing wood fibers17 Feb 2026US 12,553,182 B2International Paper Company
- Refiner11 Nov 2025US 12,467,201 B2Aikawa Iron Works Co., Ltd.
- Blade segment for refiner9 Sep 2025US 12,410,558 B2Valmet Technologies Oy
- Refiner4 Feb 2025US 12,215,462 B2Aikawa Iron Works Co., Ltd.
- Recycling of release liner glassine and sck into high quality pulp23 Jul 2026US 2026/0210041 A1Upm-Kymmene Corporation
- Measurement System and Method for Monitoring Gap Adjustment Mechanism26 Mar 2026US 2026/0084160 A1Valmet Technologies Oy
- Apparatus and method for processing wood fibers10 Jul 2025US 2025/0223760 A1International Paper Company
- Deflaking Element for Pulper28 Nov 2024US 2024/0392501 A1
- Apparatus and method for processing wood fibers31 Oct 2024US 2024/0360622 A1International Paper Company
Most cited
By later US patents
- Catalytic reactor having disk-shaped, rotor-stator, reaction surfaces55US 3,996,012 AHans Heinrich Auer · 1976
- Stain removal apparatus46US 4,011,027 AEscher Wyss Limited · 1977
- Method of treating and a disperger for disintegrating wood pulp, especially containing waste paper28US 5,176,793 ACellwood Machinery AB · 1993
- Refining element27US 5,704,559 ASunds Defibrator Industries AB · 1998
- Dispersion apparatus for the preparation of waste paper17US 4,431,482 AEscher Wyss Limited · 1984