D21D 1/34
Other mills or refiners
D21D1/34 (Other mills or refiners) appears on 55 US grants and 50 published applications in this corpus.
Search patents in D21D- Granted patents
- 55
- Published applications
- 50
- Assignees
- 45
- Inventors
- 130
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 2 |
| 2002 | 1 | 0 |
| 2003 | 3 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 2 | 1 |
| 2014 | 2 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 0 | 1 |
| 2019 | 1 | 4 |
| 2020 | 1 | 4 |
| 2021 | 2 | 4 |
| 2022 | 3 | 3 |
| 2023 | 2 | 4 |
| 2024 | 3 | 4 |
| 2025 | 7 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Refining device27 Jan 2026US 12,533,679 B2Seiko Epson Corporation
- Refining device30 Dec 2025US 12,508,601 B2Seiko Epson Corporation
- Refiner11 Nov 2025US 12,467,201 B2Aikawa Iron Works Co., Ltd.
- Pretreatment methods for cotton textile waste fabric8 Jul 2025US 12,351,983 B2Cotton Incorporated
- Driving assistance apparatus20 May 2025US 12,307,893 B2Honda Motor Co., Ltd.
- Method and plant for dense pulp refining for papermaking17 Sep 2026US 2026/0275633 A1
- Systems and methods for monitoring reject streams from fiber processing units5 Feb 2026US 2026/0035859 A1Kadant Black Clawson LLC
- Fibre processing apparatus and an associated method31 Jul 2025US 2025/0243625 A1Zelfo Technology GmbH
- Wear resistant spray coating of screen cylinders by varying the spray angle15 May 2025US 2025/0154637 A1Aikawa Fiber Technologies Oy
- Refiner5 Sep 2024US 2024/0296736 A1Aikawa Iron Works Co., Ltd.
Most cited
By later US patents
- Super microfibrillated cellulose, process for producing the same, and coated paper and tinted paper using the same136US 6,183,596 B2Tokushu Paper Mfg. Co., Ltd. · 2001
- Super microfibrillated cellulose, process for producing the same, and coated paper and tinted paper using the same110US 6,214,163 B1Tokushu Paper Mfg. Co., Ltd. · 2001
- Process for making expanded fiber54US 4,761,203 AThe Buckeye Cellulose Corporation · 1988
- Method and apparatus of defibrating a fibre-containing material50US 6,202,946 B1Megatrex Oy · 2001
- Method and apparatus for the splitting of cellulosic fibers, methods for the treatment of fibrous pulps for a papermaking process, methods for paper drying and paper products with split fibers40US 8,961,739 B22015