B01D 33/00
Filters with filtering elements which move during the filtering operation
Official title: Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D24/28 - B01D24/36; centrifuges B04B)
B01D33/00 (Filters with filtering elements which move during the filtering operation) appears on 2,292 US grants and 1,410 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,292
- Published applications
- 1,410
- Assignees
- 1,144
- Inventors
- 3,459
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 59 | 0 |
| 1977 | 45 | 0 |
| 1978 | 40 | 0 |
| 1979 | 51 | 0 |
| 1980 | 51 | 0 |
| 1981 | 55 | 0 |
| 1982 | 38 | 0 |
| 1983 | 29 | 0 |
| 1984 | 31 | 0 |
| 1985 | 41 | 0 |
| 1986 | 33 | 0 |
| 1987 | 64 | 0 |
| 1988 | 40 | 0 |
| 1989 | 65 | 0 |
| 1990 | 68 | 0 |
| 1991 | 41 | 0 |
| 1992 | 58 | 0 |
| 1993 | 58 | 0 |
| 1994 | 36 | 0 |
| 1995 | 56 | 0 |
| 1996 | 50 | 0 |
| 1997 | 64 | 0 |
| 1998 | 41 | 0 |
| 1999 | 53 | 0 |
| 2000 | 42 | 0 |
| 2001 | 63 | 11 |
| 2002 | 46 | 38 |
| 2003 | 43 | 42 |
| 2004 | 29 | 56 |
| 2005 | 25 | 43 |
| 2006 | 25 | 40 |
| 2007 | 21 | 48 |
| 2008 | 22 | 25 |
| 2009 | 16 | 37 |
| 2010 | 25 | 43 |
| 2011 | 22 | 45 |
| 2012 | 31 | 42 |
| 2013 | 32 | 61 |
| 2014 | 37 | 70 |
| 2015 | 41 | 90 |
| 2016 | 47 | 78 |
| 2017 | 45 | 78 |
| 2018 | 58 | 76 |
| 2019 | 71 | 72 |
| 2020 | 74 | 88 |
| 2021 | 61 | 65 |
| 2022 | 66 | 79 |
| 2023 | 54 | 50 |
| 2024 | 56 | 52 |
| 2025 | 44 | 42 |
| 2026 | 29 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 33/44Regenerating the filter material in the filter888
- B01D 33/06Filters with filtering elements which move during the filtering operation: with rotary857
- B01D 33/70Filters with filtering elements which move during the filtering operation: having feed599
- B01D 33/01Filters with filtering elements which move during the filtering operation: with translationally459
- B01D 33/80Accessories448
- B01D 33/58Handling the filter cake in the filter for purposes other than for443
- B01D 33/15Filters with filtering elements which move during the filtering operation: with rotary441
- B01D 33/04Filters with filtering elements which move during the filtering operation: with filtering414
All 14 subgroupsShow fewer
- B01D 33/35Filters with filtering elements which move during the filtering operation: with multiple322
- B01D 33/056Construction of filtering bands or supporting belts137
- B01D 33/27Filters with filtering elements which move during the filtering operation: with rotary126
- B01D 33/044Filters with filtering elements which move during the filtering operation: with filtering91
- B01D 33/333Filters with filtering elements which move during the filtering operation: with individual69
- B01D 33/29The movement of the filter elements being a combination of movements35
Recent patents
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- Device for cleaning liquid media using vacuum belt filters1 Oct 2026US 2026/0295478 A1
- Filtration apparatus and method of controlling filtration apparatus1 Oct 2026US 2026/0295479 A1Renasys AS
- Device and method for automatically recovering logging data storage1 Oct 2026US 2026/0295480 A1China Petroleum & Chemical Corporation
- Wedge press1 Oct 2026US 2026/0295961 A1Prime Solution, Inc.
- Universal Construction for Storing, Pumping, Mixing, Diffusing, Reacting, and Separating Fluids24 Sep 2026US 2026/0284614 A1
Most cited
By later US patents
- Systems and methods for preparing autologous fibrin glue160US 6,979,307 B2Cascade Medical Enterprises, LLC · 2005
- Blood serum separation filter disc132US 3,972,812 ABecton, Dickinson and Company · 1976
- Assembly for collection, separation and filtration of blood127US 3,931,018 ABecton, Dickinson and Company · 1976
- Vibratory screening machine and non-clogging wear-reducing screen assembly therefor125US 5,221,008 ADerrick Manufacturing Corporation · 1993
- Centrifugal force-enhanced filtration of fluids121US 4,832,851 AW. R. Grace & Co. · 1989