D21F 9/00
Complete machines for making continuous webs of paper
D21F9/00 (Complete machines for making continuous webs of paper) appears on 770 US grants and 594 published applications in this corpus.
Search patents in D21F- Granted patents
- 770
- Published applications
- 594
- Assignees
- 233
- Inventors
- 1,125
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 15 | 0 |
| 1978 | 13 | 0 |
| 1979 | 15 | 0 |
| 1980 | 12 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 15 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 14 | 0 |
| 1991 | 13 | 0 |
| 1992 | 16 | 0 |
| 1993 | 14 | 0 |
| 1994 | 8 | 0 |
| 1995 | 15 | 0 |
| 1996 | 20 | 0 |
| 1997 | 20 | 0 |
| 1998 | 22 | 0 |
| 1999 | 12 | 0 |
| 2000 | 14 | 0 |
| 2001 | 22 | 9 |
| 2002 | 25 | 22 |
| 2003 | 15 | 19 |
| 2004 | 14 | 20 |
| 2005 | 8 | 13 |
| 2006 | 15 | 16 |
| 2007 | 5 | 22 |
| 2008 | 7 | 16 |
| 2009 | 15 | 12 |
| 2010 | 8 | 17 |
| 2011 | 13 | 10 |
| 2012 | 16 | 13 |
| 2013 | 14 | 12 |
| 2014 | 10 | 11 |
| 2015 | 11 | 23 |
| 2016 | 19 | 28 |
| 2017 | 14 | 14 |
| 2018 | 16 | 28 |
| 2019 | 17 | 39 |
| 2020 | 21 | 41 |
| 2021 | 42 | 46 |
| 2022 | 37 | 32 |
| 2023 | 31 | 36 |
| 2024 | 24 | 44 |
| 2025 | 20 | 32 |
| 2026 | 20 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automated interframe alignment monitoring for sheet manufacturing applications25 Aug 2026US 12,716,823 B2Honeywell International Inc.
- Papermaking machine with press section11 Aug 2026US 12,703,944 B2Structured I, LLC
- Fibrous structures4 Aug 2026US 12,698,594 B2The Procter & Gamble Company
- Sheet manufacturing apparatus28 Jul 2026US 12,692,655 B2Seiko Epson Corporation
- Sheet manufacturing apparatus21 Jul 2026US 12,686,969 B2Seiko Epson Corporation
- 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.
- A method for producing a laminate, and a laminate27 Aug 2026US 2026/0250910 A1Stora Enso OYJ
- Foam-Based Manufacturing System and Process6 Aug 2026US 2026/0226679 A1Kimberly-Clark Worldwide, Inc.
- Method and apparatus for forming an object with a natural fibre-based substance23 Jul 2026US 2026/0208390 A1Sacmi Cooperativa Meccanici Imola Societa' Cooperativa
Most cited
By later US patents
- Process and apparatus for forming a paper web having improved bulk and absorptive capacity271US 4,102,737 AThe Procter & Gamble Company · 1978
- Extended flexible headbox slice with parallel flexible lip extensions and extended internal dividers194US 5,129,988 AKimberly-Clark Corporation · 1992
- Method and apparatus for creating a graduated distribution of granule materials in a fiber mat180US 4,927,582 AKimberly-Clark Corporation · 1990
- Soft single-ply tissue having very low sideness146US 6,051,104 AFort James Corporation · 2000
- Soft-single ply tissue having very low sidedness139US 5,695,607 AJames River Corporation of Virginia · 1997