D21F 9/02
Complete machines for making continuous webs of paper: of the fourdrinier type
Official title: of the Fourdrinier type
D21F9/02 (Complete machines for making continuous webs of paper: of the fourdrinier type) appears on 100 US grants and 89 published applications in this corpus.
Search patents in D21F- Granted patents
- 100
- Published applications
- 89
- Assignees
- 65
- Inventors
- 216
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 3 |
| 2004 | 3 | 3 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 1 | 4 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 3 | 6 |
| 2013 | 2 | 2 |
| 2014 | 2 | 4 |
| 2015 | 3 | 2 |
| 2016 | 3 | 6 |
| 2017 | 2 | 4 |
| 2018 | 3 | 7 |
| 2019 | 3 | 3 |
| 2020 | 6 | 7 |
| 2021 | 7 | 8 |
| 2022 | 7 | 6 |
| 2023 | 2 | 2 |
| 2024 | 2 | 7 |
| 2025 | 2 | 5 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fibrous structures4 Aug 2026US 12,698,594 B2The Procter & Gamble Company
- Paper making machine and process14 Jul 2026US 12,680,230 B2Toscotec S.P.A.
- Sheet manufacturing apparatus19 May 2026US 12,630,977 B2Seiko Epson Corporation
- Headbox for manufacturing a substrate21 Apr 2026US 12,606,956 B2Kimberly-Clark Worldwide, Inc.
- Method and device for producing or treating a web of fibrous material14 Apr 2026US 12,601,116 B2Voith Patent GmbH
- Method and device for producing a fibrous web17 Sep 2026US 2026/0275634 A1Andritz Kuesters GmbH
- Ceiling basemat water reduction through strategic use of pressing and vacuuming17 Sep 2026US 2026/0275636 A1USG Interiors, Inc.
- Sheet manufacturing apparatus23 Jul 2026US 2026/0210044 A1Seiko Epson Corporation
- Paper-specific moisture control in a traveling paper web29 Jan 2026US 2026/0028779 A1Intpro, LLC
- Sheet manufacturing apparatus23 Oct 2025US 2025/0327247 A1Seiko Epson Corporation
Most cited
By later US patents
- Method and device for enhancing the run of a paper web in a paper machine80US 5,865,955 AValmet Corporation · 1999
- Closed draw transfer system with gaseous pressure direction of web59US 3,981,084 AFort Howard Paper Company · 1976
- Paper recycling system and paper recycling method54US 8,882,965 B2Seiko Epson Corporation · 2014
- Process for manufacture of high bulk paper52US 4,464,224 ACIP Inc. · 1984
- Procedure and device for the elimination of liquid from a layer formed especially through a paper procuding process30US 4,808,266 ALa Cellulose Du Pin · 1989