D21F 1/78
With pressure
Official title: with pressure
D21F1/78 (With pressure) appears on 19 US grants and 12 published applications in this corpus.
Search patents in D21F- Granted patents
- 19
- Published applications
- 12
- Assignees
- 9
- Inventors
- 27
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 3 |
| 2012 | 5 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Paper pulp pressure screen16 Dec 2025US 12,497,735 B1
- Paper pulp pressure screen20 Feb 2024US 11,905,661 B1
- Method for producing a fibrous material web20 Oct 2020US 10,808,360 B2Andritz Inc.
- Apparatus for washing and dewatering pulp28 May 2013US 8,448,789 B2Metso Paper, Inc.
- Apparatus for washing and dewatering pulp25 Dec 2012US 8,337,669 B2Metso Paper, Inc.
- Displacement dewatering a web using compressed gas21 Sep 2023US 2023/0295871 A1
- Paper pulp pressure screen2 Jan 2020US 2020/0002890 A1
- Method for producing a fibrous material web28 Nov 2019US 2019/0360155 A1Andritz Inc.
- Apparatus for measuring the dewatering of a paper machine at different points of the wet end and a method for implementing it14 Nov 2019US 2019/0345673 A1
- Arrangement For Washing And Dewatering Cellulose Pulp15 Dec 2011US 2011/0303380 A1Metso Paper, Inc.
Most cited
By later US patents
- Roll press for removing water from a web of paper using solid grooved roll and compressed air61US 4,888,096 AInotech Process Ltd. · 1989
- Device for dehydrating and washing suspensions of fibrous material14US 6,311,849 B1Andritz-Patentverwaltungs-Gesselschaft m.b.H. · 2001
- Process and device to drain a fibrous pulp suspension9US 6,042,735 AVoith Sulzer Stoffaufbereitung GmbH · 2000
- Dewatering apparatus8US 5,902,456 ASunds Defibrator Industries AB · 1999
- Perforated deck made out of a plurality of segments8US 7,285,180 B2GL&V Management Hungary Kft · 2007