D21F 1/026
Details of the turbulence section
Official title: {Details of the turbulence section}
D21F1/026 (Details of the turbulence section) appears on 146 US grants and 39 published applications in this corpus.
Search patents in D21F- Granted patents
- 146
- Published applications
- 39
- Assignees
- 57
- Inventors
- 199
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 9 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 2 |
| 2002 | 7 | 2 |
| 2003 | 4 | 9 |
| 2004 | 3 | 1 |
| 2005 | 5 | 2 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 4 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 4 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 3 |
| 2022 | 2 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sheet manufacturing apparatus4 Aug 2026US 12,698,592 B2Seiko Epson Corporation
- Process and system for reorienting fibers in a foam forming process13 May 2025US 12,297,599 B2Kimberly-Clark Worldwide, Inc.
- Fiber transport apparatus and fiber transport method30 May 2023US 11,661,702 B2Seiko Epson Corporation
- Method of and an arrangement for adding at least one additional stock component to an approach flow system of a fiber web machine4 Oct 2022US 11,459,700 B2Valmet Technologies Oy
- Fibrous body accumulating device and fiber structure producing device10 May 2022US 11,326,305 B2Seiko Epson Corporation
- Method and device for producing a fibrous web17 Sep 2026US 2026/0275634 A1Andritz Kuesters GmbH
- Process and System for Reorienting Fibers in a Foam Forming Process28 Aug 2025US 2025/0270767 A1Kimberly-Clark Worldwide, Inc.
- Sheet manufacturing apparatus26 Dec 2024US 2024/0426054 A1Seiko Epson Corporation
- Process and System for Reorienting Fibers in a Foam Forming Process1 Aug 2024US 2024/0254695 A1Kimberly-Clark Worldwide, Inc.
- Method and device for producing an mfc film2 May 2024US 2024/0141589 A1Stora Enso OYJ
Most cited
By later US patents
- 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
- Method of operating a headbox apparatus for a papermaking machine30US 4,888,094 ASulzer-Escher Wyss GmbH · 1989
- Headbox apparatus for a papermaking machine30US 4,897,158 ASulzer-Escher Wyss GmbH · 1990
- Apparatus and method for the manufacture of fibrous webs29US 4,686,006 AJames River-Norwalk, Inc. · 1987