D21F 1/66
Pulp catching, de-watering, or recovering
Official title: Pulp catching, de-watering, or recovering; Re-use of pulp-water
D21F1/66 (Pulp catching, de-watering, or recovering) appears on 444 US grants and 237 published applications in this corpus.
Search patents in D21F- Granted patents
- 444
- Published applications
- 237
- Assignees
- 188
- Inventors
- 710
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 15 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 12 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 15 | 0 |
| 1992 | 6 | 0 |
| 1993 | 10 | 0 |
| 1994 | 13 | 0 |
| 1995 | 12 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 17 | 0 |
| 1999 | 17 | 0 |
| 2000 | 16 | 0 |
| 2001 | 24 | 6 |
| 2002 | 14 | 13 |
| 2003 | 18 | 9 |
| 2004 | 10 | 20 |
| 2005 | 6 | 13 |
| 2006 | 5 | 8 |
| 2007 | 9 | 4 |
| 2008 | 5 | 5 |
| 2009 | 5 | 8 |
| 2010 | 4 | 11 |
| 2011 | 8 | 9 |
| 2012 | 12 | 6 |
| 2013 | 4 | 9 |
| 2014 | 12 | 12 |
| 2015 | 8 | 8 |
| 2016 | 12 | 6 |
| 2017 | 3 | 4 |
| 2018 | 6 | 5 |
| 2019 | 3 | 13 |
| 2020 | 6 | 11 |
| 2021 | 7 | 9 |
| 2022 | 8 | 9 |
| 2023 | 12 | 11 |
| 2024 | 8 | 13 |
| 2025 | 10 | 10 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Papermaking machine with press section11 Aug 2026US 12,703,944 B2Structured I, LLC
- Dewatering apparatus and process9 Jun 2026US 12,649,989 B2The Procter & Gamble Company
- Sheet manufacturing apparatus19 May 2026US 12,630,977 B2Seiko Epson Corporation
- Method for manufacturing a barrier film comprising highly refined cellulose12 May 2026US 12,624,501 B2Stora Enso OYJ
- Headbox for manufacturing a substrate21 Apr 2026US 12,606,956 B2Kimberly-Clark Worldwide, Inc.
- Dewatering apparatus and process17 Sep 2026US 2026/0275635 A1The Procter & Gamble Company
- Foam-Based Manufacturing System and Process6 Aug 2026US 2026/0226679 A1Kimberly-Clark Worldwide, Inc.
- Dewatering box cover6 Aug 2026US 2026/0226681 A1First Quality Tissue, LLC
- Foam-Based Manufacturing System and Process23 Jul 2026US 2026/0210038 A1Kimberly-Clark Worldwide, Inc.
- A method for producing a molded fibre product19 Feb 2026US 2026/0049449 A1
Most cited
By later US patents
- Papermaking and products made thereby159US 4,388,150 AEKA Aktiebolag · 1983
- Fibrous assemblies from cationically and anionically charged fibers91US 3,998,690 AThe Procter & Gamble Company · 1976
- Perforated film clothing79US 8,815,057 B2Voith Patent GmbH · 2014
- Papermaking72US 4,385,961 AEKA Aktiebolag · 1983
- Method of and means for hydrodynamic mixing67US 4,861,165 ABeloit Corporation · 1989