D21H 23/24
During paper manufacture
Official title: during paper manufacture
D21H23/24 (During paper manufacture) appears on 178 US grants and 181 published applications in this corpus.
Search patents in D21H- Granted patents
- 178
- Published applications
- 181
- Assignees
- 131
- Inventors
- 463
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 8 | 6 |
| 2003 | 5 | 13 |
| 2004 | 3 | 15 |
| 2005 | 7 | 17 |
| 2006 | 4 | 5 |
| 2007 | 7 | 2 |
| 2008 | 1 | 13 |
| 2009 | 1 | 4 |
| 2010 | 7 | 6 |
| 2011 | 4 | 2 |
| 2012 | 1 | 2 |
| 2013 | 5 | 7 |
| 2014 | 4 | 6 |
| 2015 | 6 | 3 |
| 2016 | 6 | 11 |
| 2017 | 8 | 6 |
| 2018 | 2 | 8 |
| 2019 | 7 | 7 |
| 2020 | 4 | 11 |
| 2021 | 6 | 9 |
| 2022 | 13 | 6 |
| 2023 | 3 | 8 |
| 2024 | 5 | 7 |
| 2025 | 6 | 5 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cellulosic fiber material and process29 Sep 2026US 12,747,537 B2PaperShell AB
- Method for manufacturing a barrier film comprising highly refined cellulose12 May 2026US 12,624,501 B2Stora Enso OYJ
- Functional paper for electronics printing and methods of making9 Dec 2025US 12,492,512 B2Domtar Paper Company, LLC
- Method of making a cellulose film comprising microfibrillated cellulose30 Sep 2025US 12,428,530 B2Stora Enso OYJ
- Flame-resistant paper for radio wave absorber member and production method for same15 Jul 2025US 12,359,374 B2Toray Industries, Inc.
- Application device and method for coating a fibrous material web8 Jan 2026US 2026/0009187 A1Voith Patent GmbH
- Recyclable cellulosic structure with metal ion treatment10 Jul 2025US 2025/0223762 A1
- Flexible calcium carbonate with improved calcium carbonate retention, tissue paper including the same, and manufacturing method therefor3 Jul 2025US 2025/0215645 A1KleanNara Co., Ltd.
- A fluorochemical-free grease-barrier paper22 May 2025US 2025/0163645 A1Billerud Aktiebolag (publ)
- In-line application of dispersion barrier22 May 2025US 2025/0163648 A1Brown LLC
Most cited
By later US patents
- Process for manufacturing of formed products139US 4,508,595 A1985
- Process for making soft, strong cellulosic sheet and products made thereby136US 4,795,530 AKimberly-Clark Corporation · 1989
- Crosslinked cellulose products and method for their preparation114US 5,225,047 AWeyerhaeuser Company · 1993
- Prewettable high softness paper product having temporary wet strength97US 6,059,928 AFort James Corporation · 2000
- Soft tissue paper containing an oil and a polyhydroxy compound92US 5,575,891 AThe Procter & Gamble Company · 1996