B01D 33/44
Regenerating the filter material in the filter
Official title: Regenerating the filter material in the filter (devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D35/12)
B01D33/44 (Regenerating the filter material in the filter) appears on 888 US grants and 502 published applications in this corpus.
Search patents in B01D- Granted patents
- 888
- Published applications
- 502
- Assignees
- 532
- Inventors
- 1,503
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 17 | 0 |
| 1978 | 12 | 0 |
| 1979 | 20 | 0 |
| 1980 | 23 | 0 |
| 1981 | 23 | 0 |
| 1982 | 16 | 0 |
| 1983 | 14 | 0 |
| 1984 | 13 | 0 |
| 1985 | 19 | 0 |
| 1986 | 15 | 0 |
| 1987 | 27 | 0 |
| 1988 | 14 | 0 |
| 1989 | 16 | 0 |
| 1990 | 29 | 0 |
| 1991 | 17 | 0 |
| 1992 | 28 | 0 |
| 1993 | 29 | 0 |
| 1994 | 23 | 0 |
| 1995 | 29 | 0 |
| 1996 | 18 | 0 |
| 1997 | 21 | 0 |
| 1998 | 17 | 0 |
| 1999 | 23 | 0 |
| 2000 | 19 | 0 |
| 2001 | 29 | 7 |
| 2002 | 10 | 12 |
| 2003 | 17 | 16 |
| 2004 | 12 | 16 |
| 2005 | 10 | 15 |
| 2006 | 12 | 16 |
| 2007 | 6 | 11 |
| 2008 | 9 | 9 |
| 2009 | 4 | 14 |
| 2010 | 10 | 21 |
| 2011 | 10 | 16 |
| 2012 | 12 | 15 |
| 2013 | 12 | 20 |
| 2014 | 10 | 25 |
| 2015 | 12 | 39 |
| 2016 | 21 | 27 |
| 2017 | 12 | 23 |
| 2018 | 20 | 20 |
| 2019 | 30 | 24 |
| 2020 | 29 | 26 |
| 2021 | 12 | 23 |
| 2022 | 19 | 33 |
| 2023 | 14 | 21 |
| 2024 | 24 | 24 |
| 2025 | 19 | 15 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotating irrigation screen apparatus22 Sep 2026US 12,741,240 B2
- Brine injection system with improved filtering system8 Sep 2026US 12,728,372 B2Gea Food Solutions Bakel B.V.
- Method of filtrating liquid, and filtration apparatus for filtrating liquid25 Aug 2026US 12,714,956 B2Renasys AS
- Forming and processing slurry in carbon dioxide capture and separation systems16 Jun 2026US 12,654,125 B1AirMyne, Inc.
- Self-cleaning intake filter9 Jun 2026US 12,649,118 B2Wairere Research Limited
- Device for cleaning liquid media using vacuum belt filters1 Oct 2026US 2026/0295478 A1
- Device and method for automatically recovering logging data storage1 Oct 2026US 2026/0295480 A1China Petroleum & Chemical Corporation
- Powdered adsorbent lossless recovery method based on belt filter10 Sep 2026US 2026/0263973 A1Zhejiang Yongzheng Lithium Technology Co., Ltd.
- Apparatus and method for solid-liquid separation13 Aug 2026US 2026/0233134 A1Betolar Oyj
- Filter screen, tubular filter and filter device30 Jul 2026US 2026/0216624 A1Maag Ettlinger GmbH
Most cited
By later US patents
- Method and apparatus for cleaning filter material in a filter apparatus utilizing a suction generating nozzle99US 5,951,878 AAqua-Aerobic Systems, Inc. · 1999
- Centrifugal filtration device93US 6,517,612 B1Gore Enterprise Holdings, Inc. · 2003
- Apparatus and method for separation of solids from liquid82US 5,814,230 A1998
- Multi-purpose rotating membrane filter78US 4,925,557 A1990
- Rotary drum filter with reciprocating nozzle means70US 5,470,472 ADorr-Oliver Incorporated · 1995