D21H 25/04
Physical treatment
Official title: Physical treatment, e.g. heating, irradiating (D21H25/18 takes precedence; dryer section of machines for making continuous webs of paper D21F5/00)
D21H25/04 (Physical treatment) appears on 447 US grants and 434 published applications in this corpus.
Search patents in D21H- Granted patents
- 447
- Published applications
- 434
- Assignees
- 345
- Inventors
- 1,226
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 10 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 13 | 0 |
| 1992 | 9 | 0 |
| 1993 | 10 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 8 | 0 |
| 1999 | 12 | 0 |
| 2000 | 15 | 0 |
| 2001 | 23 | 5 |
| 2002 | 10 | 21 |
| 2003 | 15 | 21 |
| 2004 | 11 | 21 |
| 2005 | 11 | 8 |
| 2006 | 2 | 9 |
| 2007 | 5 | 12 |
| 2008 | 6 | 15 |
| 2009 | 2 | 9 |
| 2010 | 6 | 12 |
| 2011 | 9 | 11 |
| 2012 | 7 | 11 |
| 2013 | 4 | 17 |
| 2014 | 12 | 20 |
| 2015 | 17 | 25 |
| 2016 | 16 | 26 |
| 2017 | 13 | 20 |
| 2018 | 9 | 17 |
| 2019 | 15 | 21 |
| 2020 | 16 | 18 |
| 2021 | 14 | 17 |
| 2022 | 17 | 21 |
| 2023 | 10 | 21 |
| 2024 | 16 | 17 |
| 2025 | 4 | 25 |
| 2026 | 12 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low cellulosic non-wood fiber products and methods of making the same6 Oct 2026US 12,753,553 B2Archer Daniels Midland Company
- Moisture/oil resistant composite materials29 Sep 2026US 12,747,536 B2World Centric
- Biopolymer composition and its use as a powder coating11 Aug 2026US 12,703,947 B2Brightplus Oy
- Method of controlling sheet manufacturing apparatus28 Jul 2026US 12,692,658 B2Seiko Epson Corporation
- Water resistant and repulpable compositions28 Jul 2026US 12,692,662 B2Neenah, Inc.
- Method and apparatus for inputting thermal energy into a fluid, related apparatus and uses24 Sep 2026US 2026/0287253 A1Coolbrook Oy
- A method for producing a laminate, and a laminate27 Aug 2026US 2026/0250910 A1Stora Enso OYJ
- Process for producing a fibrous material27 Aug 2026US 2026/0250912 A1Stora Enso OYJ
- Coating composition, method for forming a coating and use30 Jul 2026US 2026/0217988 A1Innomost Oy
- Paper for overwrapping25 Jun 2026US 2026/0176823 A1Billerud Aktiebolag (publ)
Most cited
By later US patents
- Substrate for wallboard joint tape and process for making same802US 10,106,932 B2International Paper Company · 2018
- Low density fiber-reinforced plastic composites206US 4,643,940 AThe Dow Chemical Company · 1987
- Fibrous structures containing immobilized particulate matter181US 5,486,410 AHoechst Celanese Corporation · 1996
- Multi-ply absorbent wiping product having relatively inextensible center ply bonded to highly extensible outer plies172US 3,953,638 AThe Procter & Gamble Company · 1976
- Adsorptive nonwoven fabric comprising fused fibers, non-fused fibers and absorptive material and method of making same154US 4,160,059 AHonshu Seishi Kabushiki Kaisha · 1979