D21F 1/028
Details of the nozzle section
Official title: {Details of the nozzle section}
D21F1/028 (Details of the nozzle section) appears on 238 US grants and 60 published applications in this corpus.
Search patents in D21F- Granted patents
- 238
- Published applications
- 60
- Assignees
- 87
- Inventors
- 305
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 2 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 11 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 14 | 0 |
| 1990 | 14 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 2 |
| 2002 | 12 | 8 |
| 2003 | 4 | 8 |
| 2004 | 4 | 1 |
| 2005 | 3 | 4 |
| 2006 | 1 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 6 |
| 2009 | 3 | 2 |
| 2010 | 4 | 1 |
| 2011 | 2 | 2 |
| 2012 | 1 | 5 |
| 2013 | 1 | 4 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 3 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 4 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dispersion device and accumulation device16 Sep 2025US 12,416,109 B2Seiko Epson Corporation
- 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
- Method and apparatus for producing a fiber web21 Feb 2023US 11,585,047 B2Teknologian tutkimuskeskus VTT Oy
- Method and apparatus for producing a fibre web23 Mar 2021US 10,954,632 B2Teknologian tutkimuskeskus VTT Oy
- Sheet manufacturing apparatus9 Feb 2021US 10,914,034 B2Seiko Epson Corporation
- Device for producing a fibrous web16 Jul 2026US 2026/0201640 A1Andritz Kuesters GmbH
- Absorbent material and method of providing an absorbent material17 Apr 2025US 2025/0122670 A1Neenah Gessner GmbH
- Barrier layers comprising nanocellulose onto the surface of paper or paperboard substrates at the wet end of a papermaking process24 Oct 2024US 2024/0352675 A1FiberLean Technologies Limited
- Dispersion device and accumulation device27 Jun 2024US 2024/0209553 A1Seiko Epson Corporation
- Barrier coatings applied to nanocellulose-coated paper and paperboard23 May 2024US 2024/0167227 A1FiberLean Technologies Limited
Most cited
By later US patents
- Extended flexible headbox slice with parallel flexible lip extensions and extended internal dividers194US 5,129,988 AKimberly-Clark Corporation · 1992
- Method of making ply-separable paper128US 4,225,382 AThe Procter & Gamble Company · 1980
- Multilayer headbox41US 5,645,689 AVoith Sulzer Papiermachinen GmbH · 1997
- Headbox apparatus with stock dilution conduits for basis weight control39US 5,196,091 ABeloit Technologies, Inc. · 1993
- Apparatus for forming a multilayer jet of paper making stock37US 4,445,974 AAktiebolaget Karlstads Mekaniska Werkstad · 1984