D21F 1/523
Covers thereof
Official title: {Covers thereof}
D21F1/523 (Covers thereof) appears on 57 US grants and 38 published applications in this corpus.
Search patents in D21F- Granted patents
- 57
- Published applications
- 38
- Assignees
- 33
- Inventors
- 97
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 1 |
| 2004 | 2 | 5 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 2 | 5 |
| 2008 | 0 | 0 |
| 2009 | 5 | 1 |
| 2010 | 1 | 1 |
| 2011 | 3 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 4 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 4 |
| 2020 | 2 | 0 |
| 2021 | 0 | 3 |
| 2022 | 1 | 2 |
| 2023 | 2 | 0 |
| 2024 | 2 | 0 |
| 2025 | 0 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dewatering box cover19 Nov 2024US 12,146,263 B2First Quality Tissue, LLC
- Dewatering box cover19 Nov 2024US 12,146,265 B2First Quality Tissue, LLC
- 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
- Dewatering device10 Oct 2023US 11,781,269 B2Voith Patent GmbH
- Pulp washer mist eliminator and foam remover system5 Jul 2022US 11,377,794 B2
- Dewatering box cover6 Aug 2026US 2026/0226681 A1First Quality Tissue, LLC
- Dewatering box cover30 Jul 2026US 2026/0218451 A1First Quality Tissue, LLC
- Dewatering box cover13 Feb 2025US 2025/0052003 A1First Quality Tissue, LLC
- Dewatering box cover13 Feb 2025US 2025/0052004 A1First Quality Tissue, LLC
- Elongated Component for a Manufacturing Machine of a Fibrous Cellulosic Web, Its Use and Method for Recycling22 Dec 2022US 2022/0403596 A1Valmet Technologies Oy
Most cited
By later US patents
- Continuous controlled drainage20US 5,089,090 AJWI Ltd. · 1992
- Stock formation in a paper making process18US 4,140,573 AJWI Ltd. · 1979
- Suction box apparatus with composite cover elements mounted in slots on cross braces17US 5,076,894 A1991
- Pressure control forming section16US 5,011,577 AJWI Ltd. · 1991
- Suction box covers for cleaning papermaking machine felts14US 5,147,508 AThe Nash Engineering Company · 1992