D21F 1/483
Drainage foils and bars
Official title: {Drainage foils and bars}
D21F1/483 (Drainage foils and bars) appears on 142 US grants and 79 published applications in this corpus.
Search patents in D21F- Granted patents
- 142
- Published applications
- 79
- Assignees
- 61
- Inventors
- 181
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 8 |
| 2003 | 2 | 9 |
| 2004 | 6 | 9 |
| 2005 | 3 | 4 |
| 2006 | 5 | 1 |
| 2007 | 3 | 3 |
| 2008 | 1 | 5 |
| 2009 | 3 | 3 |
| 2010 | 3 | 4 |
| 2011 | 5 | 2 |
| 2012 | 5 | 1 |
| 2013 | 2 | 1 |
| 2014 | 2 | 4 |
| 2015 | 3 | 1 |
| 2016 | 3 | 4 |
| 2017 | 3 | 3 |
| 2018 | 2 | 2 |
| 2019 | 3 | 2 |
| 2020 | 0 | 2 |
| 2021 | 3 | 1 |
| 2022 | 0 | 3 |
| 2023 | 3 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dewatering apparatus and process9 Jun 2026US 12,649,989 B2The Procter & Gamble Company
- Scraper bar for use in a plant for producing a paper web and plant having the scraper bar12 Mar 2024US 11,926,962 B2
- Elongated component for a manufacturing machine of a fibrous cellulosic web, its use and method for recycling14 Nov 2023US 11,814,793 B2Valmet Technologies Oy
- Dewatering device10 Oct 2023US 11,781,269 B2Voith Patent GmbH
- Monitoring system, control system, and actuation assembly of a paper machine, and a method of controlling5 Sep 2023US 11,746,471 B2IBS of America
- Dewatering apparatus and process17 Sep 2026US 2026/0275635 A1The Procter & Gamble Company
- Dewatering Element for Dewatering a Fibrous Web30 Jul 2026US 2026/0218450 A1Andritz Inc.
- Dewatering bar on a papermaking machine and wire section of a papermaking machine19 Mar 2026US 2026/0078547 A1
- Dewatering apparatus and process5 Dec 2024US 2024/0401271 A1The Procter & Gamble Company
- Monitoring system, control system, and actuation assembly of a paper machine, and a method of controlling21 Dec 2023US 2023/0407564 A1IBS of America
Most cited
By later US patents
- Adjustable angle foil for paper making machine with rigid foil body and cam actuation means36US 5,169,500 AWilbanks International, Inc. · 1992
- Dewatering device with adjustable force elements for the web-forming section of a papermaking machine35US 5,262,010 ASulzer-Escher Wyss GmbH · 1993
- Hydrofoil blade for producing turbulence34US 4,838,996 AM/K Systems · 1989
- Fourdrinier table32US 4,321,108 ABeloit Corporation · 1982
- Method and machine for manufacturing paper products using fourdrinier forming31US 9,677,224 B2IBS of America · 2017