D21F 5/02
Drying on cylinders
D21F5/02 (Drying on cylinders) appears on 737 US grants and 245 published applications in this corpus.
Search patents in D21F- Granted patents
- 737
- Published applications
- 245
- Assignees
- 194
- Inventors
- 925
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 11 | 0 |
| 1979 | 8 | 0 |
| 1980 | 19 | 0 |
| 1981 | 7 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 18 | 0 |
| 1985 | 24 | 0 |
| 1986 | 14 | 0 |
| 1987 | 21 | 0 |
| 1988 | 11 | 0 |
| 1989 | 19 | 0 |
| 1990 | 23 | 0 |
| 1991 | 25 | 0 |
| 1992 | 29 | 0 |
| 1993 | 20 | 0 |
| 1994 | 19 | 0 |
| 1995 | 27 | 0 |
| 1996 | 38 | 0 |
| 1997 | 30 | 0 |
| 1998 | 36 | 0 |
| 1999 | 44 | 0 |
| 2000 | 39 | 0 |
| 2001 | 21 | 5 |
| 2002 | 24 | 18 |
| 2003 | 11 | 14 |
| 2004 | 17 | 11 |
| 2005 | 9 | 10 |
| 2006 | 13 | 14 |
| 2007 | 3 | 12 |
| 2008 | 6 | 13 |
| 2009 | 7 | 14 |
| 2010 | 8 | 12 |
| 2011 | 4 | 8 |
| 2012 | 6 | 2 |
| 2013 | 6 | 6 |
| 2014 | 1 | 4 |
| 2015 | 4 | 5 |
| 2016 | 4 | 12 |
| 2017 | 6 | 4 |
| 2018 | 8 | 14 |
| 2019 | 8 | 11 |
| 2020 | 11 | 11 |
| 2021 | 13 | 10 |
| 2022 | 8 | 6 |
| 2023 | 9 | 6 |
| 2024 | 5 | 13 |
| 2025 | 4 | 6 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sheet separating apparatus and sheet manufacturing apparatus8 Sep 2026US 12,729,484 B2Seiko Epson Corporation
- Moving fluid in a rotating cylinder11 Aug 2026US 12,703,945 B2
- Fibrous structures4 Aug 2026US 12,698,594 B2The Procter & Gamble Company
- Sheet manufacturing apparatus21 Jul 2026US 12,686,972 B2Seiko Epson Corporation
- Method and device for producing or treating a web of fibrous material14 Apr 2026US 12,601,116 B2Voith Patent GmbH
- Paper making machine27 Aug 2026US 2026/0250907 A1Toscotec S.P.A.
- Collar for compressing sleeve on drum4 Jun 2026US 2026/0151982 A1Suominen Oyj
- A sleeve for a drum7 May 2026US 2026/0125836 A1Suominen Oyj
- A steam supply system and a method of supplying steam15 Jan 2026US 2026/0015793 A1James Cropper PLC
- Yankee drier for paper production6 Nov 2025US 2025/0341055 A1Toscotec S.P.A.
Most cited
By later US patents
- Methods and apparatus for the rapid consolidation of moist porous webs69US 4,324,613 A1982
- Apparatus for drying a fibrous web66US 8,196,314 B2Voith Patent GmbH · 2012
- Device in the drying section of a paper machine63US 4,441,263 AValmet Corporation · 1984
- Paper machine drying section and method for operating same58US 4,202,113 AValmet Corporation · 1980
- High speed paper drying58US 4,359,827 AWeyerhaeuser Company · 1982