D21D 1/30
Disc mills
D21D1/30 (Disc mills) appears on 427 US grants and 282 published applications in this corpus.
Search patents in D21D- Granted patents
- 427
- Published applications
- 282
- Assignees
- 142
- Inventors
- 508
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 13 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 13 | 0 |
| 1996 | 6 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 15 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 6 |
| 2002 | 7 | 8 |
| 2003 | 9 | 11 |
| 2004 | 5 | 9 |
| 2005 | 10 | 10 |
| 2006 | 6 | 14 |
| 2007 | 9 | 9 |
| 2008 | 8 | 12 |
| 2009 | 5 | 13 |
| 2010 | 13 | 7 |
| 2011 | 13 | 7 |
| 2012 | 6 | 12 |
| 2013 | 6 | 10 |
| 2014 | 5 | 12 |
| 2015 | 10 | 7 |
| 2016 | 4 | 8 |
| 2017 | 5 | 12 |
| 2018 | 8 | 10 |
| 2019 | 12 | 14 |
| 2020 | 11 | 12 |
| 2021 | 12 | 19 |
| 2022 | 6 | 14 |
| 2023 | 15 | 15 |
| 2024 | 17 | 19 |
| 2025 | 12 | 5 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Refiner filling piece having multiple coatings on bars22 Sep 2026US 12,742,288 B2Aikawa Fiber Technologies Oy
- Blade for a refiner for refining lignocellulosic material, and refiner comprising at least one blade4 Aug 2026US 12,698,591 B2Valmet Corporation
- Beating gap sensor device for a refiner apparatus and calibration method24 Mar 2026US 12,584,723 B2Daprox AB
- 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
- Blade for a refiner for refining lignocellulosic material, and refiner comprising at least one blade1 Oct 2026US 2026/0297848 A1Valmet Corporation
- Method, system and program for producing a refiner segment out of a worn refiner segment, and a rebuilt refiner segment20 Aug 2026US 2026/0241456 A1Valmet Corporation
- Hemp paper packaging material for foodstuff21 May 2026US 2026/0139435 A1North Carolina State University
- Measurement System and Method for Monitoring Gap Adjustment Mechanism26 Mar 2026US 2026/0084160 A1Valmet Technologies Oy
- Refiner bars having stepped coatings8 Jan 2026US 2026/0009180 A1Aikawa Fiber Technologies Oy
Most cited
By later US patents
- Method and apparatus for manufacturing microfibrillated cellulose fiber109US 7,381,294 B2Japan Absorbent Technology Institute · 2008
- Process for making microdenominated cellulose91US 5,385,640 AMicrocell Corporation · 1995
- Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof85US 6,617,720 B1Kadant Black Clawson LLC · 2003
- High flow, low intensity plate for disc refiner73US 5,425,508 ABeloit Technologies, Inc. · 1995
- Refiner plate with variable pitch51US 5,893,525 ADurametal Corporation · 1999