D21F 1/80
Using endless screening belts
Official title: using endless screening belts
D21F1/80 (Using endless screening belts) appears on 75 US grants and 57 published applications in this corpus.
Search patents in D21F- Granted patents
- 75
- Published applications
- 57
- Assignees
- 32
- Inventors
- 122
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 3 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 3 |
| 2013 | 2 | 4 |
| 2014 | 6 | 6 |
| 2015 | 1 | 3 |
| 2016 | 6 | 1 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 2 | 4 |
| 2020 | 0 | 3 |
| 2021 | 3 | 2 |
| 2022 | 4 | 1 |
| 2023 | 2 | 6 |
| 2024 | 2 | 4 |
| 2025 | 3 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- Foam-based manufacturing system and process14 Apr 2026US 12,601,113 B2Kimberly-Clark Worldwide, Inc.
- Method for manufacturing films comprising highly refined cellulose fibers11 Nov 2025US 12,467,202 B2Stora Enso OYJ
- Foam-Based Manufacturing System and Process6 Aug 2026US 2026/0226679 A1Kimberly-Clark Worldwide, Inc.
- Foam-Based Manufacturing System and Process23 Jul 2026US 2026/0210038 A1Kimberly-Clark Worldwide, Inc.
- Papermaking machine that utilizes only a structured fabric in the forming of paper4 Dec 2025US 2025/0369184 A1Structured I, LLC
- Headbox for Manufacturing a Substrate21 Aug 2025US 2025/0263889 A1Kimberly-Clark Worldwide, Inc.
- Method and apparatus for recovering fibres5 Jun 2025US 2025/0179730 A1
Most cited
By later US patents
- Perforated film clothing79US 8,815,057 B2Voith Patent GmbH · 2014
- Process for treating a slurry of cellulosic material45US 4,046,621 ACanadian International Paper Company · 1977
- Method and machine for manufacturing paper products using fourdrinier forming31US 9,677,224 B2IBS of America · 2017
- Process for treating a slurry of cellulosic material29US 4,014,736 ACanadian International Paper Company · 1977
- Method for dewatering a porous wet web19US 5,445,746 ACer-Wat, Inc. · 1995