D21F 5/182
Through perforated cylinders
Official title: {through perforated cylinders}
D21F5/182 (Through perforated cylinders) appears on 142 US grants and 98 published applications in this corpus.
Search patents in D21F- Granted patents
- 142
- Published applications
- 98
- Assignees
- 52
- Inventors
- 220
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 8 | 6 |
| 2003 | 7 | 7 |
| 2004 | 7 | 9 |
| 2005 | 8 | 8 |
| 2006 | 6 | 7 |
| 2007 | 5 | 5 |
| 2008 | 1 | 4 |
| 2009 | 2 | 8 |
| 2010 | 6 | 3 |
| 2011 | 5 | 2 |
| 2012 | 7 | 1 |
| 2013 | 3 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 3 |
| 2019 | 3 | 6 |
| 2020 | 4 | 3 |
| 2021 | 8 | 6 |
| 2022 | 1 | 6 |
| 2023 | 3 | 2 |
| 2024 | 4 | 3 |
| 2025 | 4 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compact high performance through-air apparatus14 Jul 2026US 12,680,757 B2Valmet Corporation
- Through-air apparatus with a shroud30 Jun 2026US 12,668,923 B2Valmet Corporation
- Fibrous structures and methods for making same16 Dec 2025US 12,497,736 B2The Procter & Gamble Company
- Lotioned fibrous structures and methods for making same23 Sep 2025US 12,421,666 B2The Procter & Gamble Company
- Apparatus for and method of measuring suspension flowing in tube fractionator10 Jun 2025US 12,325,957 B2Valmet Automation Oy
- Apparatus for the treatment of paper material23 Jul 2026US 2026/0210043 A1Toscotec S.P.A.
- Fibrous Structures and Methods for Making Same12 Mar 2026US 2026/0071388 A1The Procter & Gamble Company
- Lotioned fibrous structures and methods for making same11 Dec 2025US 2025/0376810 A1The Procter & Gamble Company
- Apparatus for and method of measuring suspension flowing in tube fractionator4 Sep 2025US 2025/0277338 A1Valmet Automation Oy
- Through-air apparatus with a shroud28 Aug 2025US 2025/0270763 A1Valmet Corporation
Most cited
By later US patents
- Advanced dewatering system85US 7,510,631 B2Voith Patent GmbH · 2009
- Advanced dewatering system83US 7,476,293 B2Voith Patent GmbH · 2009
- Process for making throughdried tissue using exhaust gas recovery73US 6,551,461 B2Kimberly-Clark Worldwide, Inc. · 2003
- Advanced dewatering system72US 7,951,269 B2Voith Patent GmbH · 2011
- Advanced dewatering system72US 8,092,652 B2Voith Patent GmbH · 2012