D21F 5/185
Supporting webs in hot air dryers
Official title: {Supporting webs in hot air dryers}
D21F5/185 (Supporting webs in hot air dryers) appears on 63 US grants and 34 published applications in this corpus.
Search patents in D21F- Granted patents
- 63
- Published applications
- 34
- Assignees
- 33
- Inventors
- 125
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 2 |
| 2003 | 5 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 2 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 4 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 4 |
| 2019 | 0 | 1 |
| 2020 | 3 | 2 |
| 2021 | 2 | 0 |
| 2022 | 1 | 4 |
| 2023 | 2 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fibrous structures4 Aug 2026US 12,698,594 B2The Procter & Gamble Company
- System and method for controlling process fluids in a plant for manufacturing web-like paper material26 Aug 2025US 12,398,513 B2ANDRITZ Novimpianti S.r.l.
- Creped fibrous structures15 Jul 2025US 12,359,376 B2The Procter & Gamble Company
- Fibrous structures30 Apr 2024US 11,970,818 B2The Procter & Gamble Company
- Fibrous structures23 Jan 2024US 11,879,215 B2The Procter & Gamble Company
- Fibrous Structures11 Jul 2024US 2024/0229357 A1The Procter & Gamble Company
- System and method for controlling process fluids in a plant for manufacturing web-like paper material21 Sep 2023US 2023/0295872 A1ANDRITZ Novimpianti S.r.l.
- Creped fibrous structures26 Jan 2023US 2023/0027102 A1The Procter & Gamble Company
- Fibrous Structures9 Jun 2022US 2022/0178076 A1The Procter & Gamble Company
- Paper web air foil of a papermaking machine24 Mar 2022US 2022/0090320 A1First Quality Tissue, LLC
Most cited
By later US patents
- Web dryer with control of air infiltration30US 4,606,137 AThermo Electron Web Systems, Inc. · 1986
- Method for on-machine coating-drying of a paper web or the like29US 5,009,016 AValmet Corporation · 1991
- Device for float-conveying of webs of material29US 5,016,363 A1991
- Gas nozzle for use in treating material webs27US 4,274,210 AValmet Corporation · 1981
- Arrangement of pressure nozzles for the treatment of webs25US 4,932,140 AValmet Paper Machinery Inc. · 1990