B01D 46/66
Regeneration of the filtering material or filter elements inside the filter
Official title: Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence)
B01D46/66 (Regeneration of the filtering material or filter elements inside the filter) appears on 1,822 US grants and 1,689 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,822
- Published applications
- 1,689
- Assignees
- 931
- Inventors
- 3,686
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 15 | 0 |
| 1978 | 14 | 0 |
| 1979 | 18 | 0 |
| 1980 | 26 | 0 |
| 1981 | 43 | 0 |
| 1982 | 23 | 0 |
| 1983 | 15 | 0 |
| 1984 | 22 | 0 |
| 1985 | 24 | 0 |
| 1986 | 19 | 0 |
| 1987 | 22 | 0 |
| 1988 | 23 | 0 |
| 1989 | 22 | 0 |
| 1990 | 12 | 0 |
| 1991 | 9 | 0 |
| 1992 | 23 | 0 |
| 1993 | 23 | 0 |
| 1994 | 20 | 0 |
| 1995 | 31 | 0 |
| 1996 | 30 | 0 |
| 1997 | 21 | 0 |
| 1998 | 40 | 0 |
| 1999 | 22 | 0 |
| 2000 | 30 | 0 |
| 2001 | 30 | 3 |
| 2002 | 18 | 26 |
| 2003 | 27 | 30 |
| 2004 | 30 | 57 |
| 2005 | 25 | 34 |
| 2006 | 34 | 56 |
| 2007 | 23 | 42 |
| 2008 | 31 | 60 |
| 2009 | 24 | 62 |
| 2010 | 24 | 64 |
| 2011 | 50 | 68 |
| 2012 | 55 | 49 |
| 2013 | 51 | 66 |
| 2014 | 52 | 74 |
| 2015 | 51 | 71 |
| 2016 | 47 | 54 |
| 2017 | 64 | 102 |
| 2018 | 47 | 94 |
| 2019 | 89 | 115 |
| 2020 | 82 | 95 |
| 2021 | 74 | 119 |
| 2022 | 85 | 87 |
| 2023 | 69 | 76 |
| 2024 | 64 | 87 |
| 2025 | 65 | 50 |
| 2026 | 46 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 46/70By acting counter-currently on the filtering surface957
- B01D 46/80Chemical processes for the removal of the retained particles359
- B01D 46/74By forces created by movement of the filter element213
- B01D 46/68By means acting on the cake side involving movement with regard to204
- B01D 46/79By liquid process113
- B01D 46/69By means acting on the cake side without movement with respect to58
- B01D 46/785By electrical means32
- B01D 46/86Cleaning the filter surface by interrupting suction so that the filter cake12
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Most cited
By later US patents
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001
- Cleanable high efficiency filter media structure and applications for use231US 7,008,465 B2Donaldson Company, Inc. · 2006
- Filter medium and structure212US 7,314,497 B2Donaldson Company, Inc. · 2008
- Filter element locking mechanism158US 4,322,231 AFarr Company · 1982
- Z-filter media with reverse-flow cleaning systems and methods153US 7,282,075 B2Donaldson Company, Inc. · 2007