B01D 29/50
Filters with filtering elements stationary during filtration: with multiple filtering elements, characterised
Official title: with multiple filtering elements, characterised by their mutual disposition (B01D29/39 takes precedence)
B01D29/50 (Filters with filtering elements stationary during filtration: with multiple filtering elements, characterised) appears on 2,415 US grants and 2,071 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,415
- Published applications
- 2,071
- Assignees
- 1,275
- Inventors
- 4,480
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 30 | 0 |
| 1978 | 24 | 0 |
| 1979 | 15 | 0 |
| 1980 | 17 | 0 |
| 1981 | 40 | 0 |
| 1982 | 21 | 0 |
| 1983 | 14 | 0 |
| 1984 | 24 | 0 |
| 1985 | 31 | 0 |
| 1986 | 36 | 0 |
| 1987 | 38 | 0 |
| 1988 | 41 | 0 |
| 1989 | 46 | 0 |
| 1990 | 47 | 0 |
| 1991 | 41 | 0 |
| 1992 | 46 | 0 |
| 1993 | 40 | 0 |
| 1994 | 29 | 0 |
| 1995 | 38 | 0 |
| 1996 | 41 | 0 |
| 1997 | 54 | 0 |
| 1998 | 60 | 0 |
| 1999 | 55 | 0 |
| 2000 | 45 | 0 |
| 2001 | 58 | 19 |
| 2002 | 67 | 56 |
| 2003 | 55 | 47 |
| 2004 | 32 | 60 |
| 2005 | 27 | 57 |
| 2006 | 34 | 43 |
| 2007 | 29 | 57 |
| 2008 | 23 | 54 |
| 2009 | 24 | 54 |
| 2010 | 37 | 67 |
| 2011 | 38 | 56 |
| 2012 | 55 | 76 |
| 2013 | 41 | 86 |
| 2014 | 51 | 89 |
| 2015 | 48 | 127 |
| 2016 | 63 | 96 |
| 2017 | 73 | 101 |
| 2018 | 72 | 111 |
| 2019 | 105 | 110 |
| 2020 | 109 | 148 |
| 2021 | 100 | 120 |
| 2022 | 82 | 107 |
| 2023 | 94 | 91 |
| 2024 | 91 | 96 |
| 2025 | 62 | 92 |
| 2026 | 52 | 51 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Candle filter device6 Oct 2026US 12,752,222 B2Lenzing Aktiengesellschaft
- Systems and methods for stormwater management6 Oct 2026US 12,753,093 B2Advanced Drainage Systems, Inc.
- Automatic swimming pool cleaners especially adept at climbing and cleaning pool stairs29 Sep 2026US 12,747,605 B2Zodiac Pool Systems LLC
- Recovery tank22 Sep 2026US 12,740,683 B2SharkNinja Operating LLC
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Filtration manifold with multiple ports8 Oct 2026US 2026/0309264 A1Midea Group Co., Ltd.
- Filter arrangements for liquids and methods of use1 Oct 2026US 2026/0295475 A1Donaldson Company, Inc.
- Gas filter element, filter device and method of use1 Oct 2026US 2026/0295476 A1Pall Corporation
- Filter device for removing particles from a liquid24 Sep 2026US 2026/0284560 A1Mst Nl B.V.
- Vortical cross-flow filtration system10 Sep 2026US 2026/0263971 A1Cleanr Inc.
Most cited
By later US patents
- Deformable well screen320US 5,901,789 AShell Oil Company · 1999
- Environmentally friendly filter cartridge275US 5,685,985 ABaldwin Filters, Inc. · 1997
- Deformable well screen218US 6,012,522 AShell Oil Company · 2000
- Open flow filter with safety element214US 6,416,561 B1Nelson Industries, Inc. · 2002
- Multi-element cylindrical filter with equalized flow185US 6,511,599 B2Nelson Industries, Inc. · 2003