D21F 3/10
Suction rolls
Official title: Suction rolls, e.g. couch rolls
D21F3/10 (Suction rolls) appears on 155 US grants and 108 published applications in this corpus.
Search patents in D21F- Granted patents
- 155
- Published applications
- 108
- Assignees
- 66
- Inventors
- 295
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 10 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 0 |
| 2002 | 8 | 5 |
| 2003 | 5 | 4 |
| 2004 | 1 | 3 |
| 2005 | 0 | 4 |
| 2006 | 7 | 2 |
| 2007 | 1 | 9 |
| 2008 | 0 | 0 |
| 2009 | 4 | 4 |
| 2010 | 2 | 0 |
| 2011 | 1 | 2 |
| 2012 | 2 | 2 |
| 2013 | 2 | 4 |
| 2014 | 4 | 8 |
| 2015 | 2 | 10 |
| 2016 | 8 | 6 |
| 2017 | 5 | 7 |
| 2018 | 2 | 4 |
| 2019 | 6 | 3 |
| 2020 | 3 | 4 |
| 2021 | 4 | 5 |
| 2022 | 4 | 9 |
| 2023 | 3 | 1 |
| 2024 | 1 | 7 |
| 2025 | 4 | 4 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adjusting rolls22 Sep 2026US 12,742,289 B2Voith Patent GmbH
- Paper making machine and process14 Jul 2026US 12,680,230 B2Toscotec S.P.A.
- Seal strip wear monitoring systems and assemblies therefor2 Jun 2026US 12,644,229 B2Andritz Inc.
- Methods, devices, and systems for seal strip zone module strip position determination21 Oct 2025US 12,448,733 B2Stowe Woodward Licensco, LLC
- Extended nip press apparatus1 Jul 2025US 12,344,995 B2Occendo AB
- Water soluble amphoteric emulsion terpolymers, methods of making, and methods of use as retention and dewatering aids30 Jul 2026US 2026/0218455 A1
- Methods, devices, and systems for monitoring bearings in suction rollers24 Apr 2025US 2025/0128899 A1Stowe Woodward Licensco, LLC
- An extended nip press apparatus27 Mar 2025US 2025/0101682 A1Occzendo AB
- Method for adjustment of a component23 Jan 2025US 2025/0029231 A1Voith Patent GmbH
- Methods, devices, and systems for seal strip zone module strip position determination9 Jan 2025US 2025/0012012 A1Stowe Woodward Licensco, LLC
Most cited
By later US patents
- Method of and apparatus for removing liquid for webs of porous material143US 4,556,450 AThe Procter & Gamble Company · 1985
- Method and machine for drying a material web with guide rollers58US 5,829,164 AVoith Sulzer Papiermaschinen GmbH · 1998
- Machine for the production of tissue paper56US 8,303,773 B2Voith Patent GmbH · 2012
- Paper webs having a watermark pattern51US 7,070,678 B2Kimberly-Clark Worldwide, Inc. · 2006
- Method and device for drawing a web through a group of drying cylinders46US 5,022,163 AValmet Paper Machinery Inc. · 1991