D21F 11/02
Processes for making continuous lengths of paper, or of cardboard, or of
Official title: of the Fourdrinier type
D21F11/02 (Processes for making continuous lengths of paper, or of cardboard, or of) appears on 221 US grants and 182 published applications in this corpus.
Search patents in D21F- Granted patents
- 221
- Published applications
- 182
- Assignees
- 126
- Inventors
- 511
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 10 | 3 |
| 2002 | 7 | 11 |
| 2003 | 9 | 10 |
| 2004 | 10 | 13 |
| 2005 | 5 | 6 |
| 2006 | 2 | 6 |
| 2007 | 1 | 3 |
| 2008 | 5 | 3 |
| 2009 | 0 | 2 |
| 2010 | 2 | 5 |
| 2011 | 4 | 1 |
| 2012 | 3 | 3 |
| 2013 | 2 | 5 |
| 2014 | 3 | 1 |
| 2015 | 1 | 3 |
| 2016 | 2 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 5 |
| 2019 | 2 | 7 |
| 2020 | 4 | 10 |
| 2021 | 8 | 13 |
| 2022 | 12 | 8 |
| 2023 | 7 | 24 |
| 2024 | 10 | 18 |
| 2025 | 13 | 10 |
| 2026 | 10 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing a machine glazed paper comprising microfibrillated cellulose and a machine glazed paper25 Aug 2026US 12,716,172 B2Stora Enso OYJ
- Assymetric paperboard25 Aug 2026US 12,716,176 B2Billerud Aktiebolag (publ)
- Paper making machine and process14 Jul 2026US 12,680,230 B2Toscotec S.P.A.
- Durable tissue product14 Jul 2026US 12,680,233 B2Kimberly-Clark Worldwide, Inc.
- Headbox for manufacturing a substrate21 Apr 2026US 12,606,956 B2Kimberly-Clark Worldwide, Inc.
- Method for making a multi-layered board10 Sep 2026US 2026/0265999 A1Kemira Oyj
- Method and device for producing a fibrous web20 Aug 2026US 2026/0243021 A1Andritz Kuesters GmbH
- Water soluble amphoteric emulsion terpolymers, methods of making, and methods of use as retention and dewatering aids30 Jul 2026US 2026/0218455 A1
- Multi-ply liner with washed nssc pulp30 Jul 2026US 2026/0218457 A1Stora Enso OYJ
- Method for production of a multi-ply paperboard16 Jul 2026US 2026/0201652 A1Billerud Aktiebolag (publ)
Most cited
By later US patents
- Method for making a fibrous structure comprising cellulosic and synthetic fibers1,393US 7,354,502 B2The Procter & Gamble Company · 2008
- Process for forming a layered paper web having improved bulk, tactile impression and absorbency and paper thereof629US 3,994,771 AThe Procter & Gamble Company · 1976
- Layered paper having a soft and smooth velutinous surface, and method of making such paper360US 4,300,981 AThe Procter & Gamble Company · 1981
- Uncreped throughdried towels and wipers having high strength and absorbency257US 5,399,412 AKimberly-Clark Corporation · 1995
- Method for making soft layered tissues197US 5,494,554 AKimberly-Clark Corporation · 1996