D21F 1/50
Suction boxes with rolls
D21F1/50 (Suction boxes with rolls) appears on 16 US grants and 14 published applications in this corpus.
Search patents in D21F- Granted patents
- 16
- Published applications
- 14
- Assignees
- 12
- Inventors
- 33
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 3 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods, devices, and systems for seal strip zone module strip position determination21 Oct 2025US 12,448,733 B2Stowe Woodward Licensco, LLC
- Sealing strip system and sealing strip21 Jun 2022US 11,365,514 B2Voith Patent GmbH
- Pulp production arrangement and method12 Mar 2019US 10,227,728 B2Valmet Corporation
- Apparatus and method for forming a continuous web of fibers8 May 2018US 9,963,825 B2
- Sealing device5 Sep 2017US 9,752,683 B2Voith Patent GmbH
- Methods, devices, and systems for seal strip zone module strip position determination9 Jan 2025US 2025/0012012 A1Stowe Woodward Licensco, LLC
- Inclined-wire former and method of producing a fibrous web22 Feb 2024US 2024/0060238 A1Voith Patent GmbH
- Sealing strip system and sealing strip25 Mar 2021US 2021/0087747 A1Voith Patent GmbH
- Pulp production arrangement and method20 Oct 2016US 2016/0305067 A1Valmet Corporation
- Steel shell for a suction roll and a method of producing a steel product10 Sep 2015US 2015/0252529 A1Outokumpu Oyj
Most cited
By later US patents
- Vacuum box for use in high speed papermaking56US 4,359,828 AWeyerhaeuser Company · 1982
- Method and apparatus for forming paper37US 4,306,934 A1981
- Low shear Uhle box23US 5,314,585 AChampion International Corporation · 1994
- Apparatus for air-laying of fibrous material or granules23US 6,000,102 ASCA Molnlycke AB · 1999
- Paper-machine structure and method for subjecting a web to suction11US 4,172,759 AValmet Corporation · 1979