B01D 46/70
By acting counter-currently on the filtering surface
Official title: by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
B01D46/70 (By acting counter-currently on the filtering surface) appears on 957 US grants and 774 published applications in this corpus.
Search patents in B01D- Granted patents
- 957
- Published applications
- 774
- Assignees
- 525
- Inventors
- 1,751
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 10 | 0 |
| 1980 | 17 | 0 |
| 1981 | 31 | 0 |
| 1982 | 17 | 0 |
| 1983 | 7 | 0 |
| 1984 | 16 | 0 |
| 1985 | 14 | 0 |
| 1986 | 15 | 0 |
| 1987 | 17 | 0 |
| 1988 | 19 | 0 |
| 1989 | 18 | 0 |
| 1990 | 9 | 0 |
| 1991 | 8 | 0 |
| 1992 | 15 | 0 |
| 1993 | 16 | 0 |
| 1994 | 15 | 0 |
| 1995 | 20 | 0 |
| 1996 | 24 | 0 |
| 1997 | 10 | 0 |
| 1998 | 24 | 0 |
| 1999 | 12 | 0 |
| 2000 | 17 | 0 |
| 2001 | 20 | 2 |
| 2002 | 13 | 18 |
| 2003 | 18 | 19 |
| 2004 | 20 | 28 |
| 2005 | 16 | 14 |
| 2006 | 9 | 27 |
| 2007 | 10 | 19 |
| 2008 | 18 | 20 |
| 2009 | 9 | 27 |
| 2010 | 8 | 24 |
| 2011 | 27 | 36 |
| 2012 | 23 | 25 |
| 2013 | 22 | 35 |
| 2014 | 23 | 34 |
| 2015 | 22 | 35 |
| 2016 | 21 | 29 |
| 2017 | 45 | 48 |
| 2018 | 25 | 35 |
| 2019 | 26 | 43 |
| 2020 | 30 | 42 |
| 2021 | 30 | 67 |
| 2022 | 37 | 29 |
| 2023 | 35 | 40 |
| 2024 | 27 | 32 |
| 2025 | 21 | 20 |
| 2026 | 20 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Airbox with debris removal system28 Jul 2026US 12,691,400 B2Caterpillar Inc.
- Pulse air cleaner system with pulse tube extension21 Jul 2026US 12,685,956 B2Donaldson Company, Inc.
- Particle removal device and method for wet cleaning of a particle removal device23 Jun 2026US 12,661,608 B2Glatt GmbH
- Bin vent apparatus and methods16 Jun 2026US 12,653,110 B2Grain Processing Corporation
- Dust control system for spot filters9 Jun 2026US 12,649,632 B1AG Growth International Inc.
- Filter systems with filter bag assemblies including filter bags with radial seal gaskets17 Sep 2026US 2026/0273447 A1Donaldson Company, Inc.
- Elimination of contaminants of concern including poly- and perfluoroalkyl substances (pfas) in a gasification process using an indirectly-heated dryer with closed-loop thermal fluid heat recovery10 Sep 2026US 2026/0265625 A1Aries Clean Technologies LLC
- Improved industrial dust extractors30 Jul 2026US 2026/0216630 A1Husqvarna AB
- Flue gas cleaning system23 Jul 2026US 2026/0208089 A1Kanadevia Inova AG
- Apparatus for removing dust emitted from melting furnace25 Jun 2026US 2026/0177320 A1Korea Hydro & Nuclear Power Co., Ltd.
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