D21F 5/022
Heating the cylinders
Official title: {Heating the cylinders}
D21F5/022 (Heating the cylinders) appears on 110 US grants and 48 published applications in this corpus.
Search patents in D21F- Granted patents
- 110
- Published applications
- 48
- Assignees
- 73
- Inventors
- 211
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 5 |
| 2003 | 4 | 2 |
| 2004 | 4 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 3 |
| 2009 | 1 | 2 |
| 2010 | 2 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 4 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 1 |
| 2021 | 2 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 5 |
| 2025 | 0 | 3 |
| 2026 | 2 | 2 |
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
- Sheet manufacturing apparatus21 Jul 2026US 12,686,972 B2Seiko Epson Corporation
- Method of making a molded paper web22 Aug 2023US 11,732,416 B2GPCP IP Holdings LLC
- Sheet manufacturing apparatus12 Apr 2022US 11,298,725 B2Seiko Epson Corporation
- Methods of making paper products using a molding roll5 Oct 2021US 11,136,719 B2GPCP IP Holdings LLC
- Paper making machine27 Aug 2026US 2026/0250907 A1Toscotec S.P.A.
- 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.
- Papermaking machine6 Nov 2025US 2025/0341056 A1Toscotec S.P.A.
- Cylinder for Drying a Fibrous Web18 Sep 2025US 2025/0290695 A1Andritz Inc.
Most cited
By later US patents
- Methods and apparatus for the rapid consolidation of moist porous webs69US 4,324,613 A1982
- Apparatus for controlling the heating and cooling of a roll45US 5,079,817 AEduard Kusters Maschinenfabrik GmbH & Co. KG · 1992
- Method of operating a papermachine drying line36US 4,314,878 AWestvaco Corporation · 1982
- Apparatus and method for electromagnetic heating of a roll32US 4,675,487 AValmet Corporation · 1987
- Heated drum having high thermal flux and belt press using same29US 4,781,795 AWeyerhaeuser Company · 1988