B01D 41/04
Regeneration of the filtering material or filter elements outside the filter for
Official title: of rigid self-supporting filtering material
B01D41/04 (Regeneration of the filtering material or filter elements outside the filter for) appears on 221 US grants and 212 published applications in this corpus.
Search patents in B01D- Granted patents
- 221
- Published applications
- 212
- Assignees
- 131
- Inventors
- 507
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 10 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 7 |
| 2003 | 7 | 4 |
| 2004 | 4 | 5 |
| 2005 | 1 | 4 |
| 2006 | 2 | 8 |
| 2007 | 3 | 7 |
| 2008 | 6 | 9 |
| 2009 | 4 | 8 |
| 2010 | 5 | 10 |
| 2011 | 2 | 6 |
| 2012 | 7 | 8 |
| 2013 | 0 | 6 |
| 2014 | 5 | 8 |
| 2015 | 4 | 12 |
| 2016 | 4 | 11 |
| 2017 | 14 | 14 |
| 2018 | 3 | 9 |
| 2019 | 8 | 11 |
| 2020 | 8 | 12 |
| 2021 | 12 | 5 |
| 2022 | 8 | 15 |
| 2023 | 6 | 8 |
| 2024 | 15 | 11 |
| 2025 | 10 | 10 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Cleanable filter bag assembly72US 6,110,243 AGore Enterprise Holdings, Inc. · 2000
- Cleaner assembly for air filters62US 4,808,234 AMcWinn Filter Services Ltd. · 1989
- Filter cleaning system60US 4,299,245 A1981
- Embedded spin-clean cartridge-type water filters57US 6,156,213 A2000
- Spinner for cleaning cartridge-type water filters45US 5,989,419 A1999