B01D 33/35
Filters with filtering elements which move during the filtering operation: with multiple
Official title: with multiple filtering elements characterised by their mutual disposition ({B01D33/042} , B01D33/21 take precedence)
B01D33/35 (Filters with filtering elements which move during the filtering operation: with multiple) appears on 322 US grants and 233 published applications in this corpus.
Search patents in B01D- Granted patents
- 322
- Published applications
- 233
- Assignees
- 176
- Inventors
- 515
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 10 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 3 |
| 2002 | 10 | 7 |
| 2003 | 12 | 11 |
| 2004 | 5 | 11 |
| 2005 | 4 | 11 |
| 2006 | 10 | 11 |
| 2007 | 6 | 8 |
| 2008 | 5 | 6 |
| 2009 | 4 | 8 |
| 2010 | 3 | 11 |
| 2011 | 9 | 11 |
| 2012 | 7 | 9 |
| 2013 | 9 | 10 |
| 2014 | 4 | 14 |
| 2015 | 10 | 11 |
| 2016 | 8 | 6 |
| 2017 | 7 | 16 |
| 2018 | 3 | 6 |
| 2019 | 9 | 7 |
| 2020 | 11 | 15 |
| 2021 | 11 | 9 |
| 2022 | 10 | 9 |
| 2023 | 10 | 12 |
| 2024 | 11 | 4 |
| 2025 | 6 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for ice bath filtering22 Sep 2026US 12,741,241 B2Lowtemp Industries LLC
- Bi-directional filter19 May 2026US 12,629,620 B2Combipro AS
- Rotatable filter7 Apr 2026US 12,594,513 B2Rocker Scientific Co., Ltd.
- Fluid and solid material separator9 Dec 2025US 12,491,456 B2Schlumberger Technology Corporation
- Independent double-negative-pressure shale shaker30 Sep 2025US 12,427,452 B2Southwest Petroleum University
- Device for cleaning liquid media using vacuum belt filters1 Oct 2026US 2026/0295478 A1
- Filter bag and filter module for a rotary disk filter and rotary disk filter2 Apr 2026US 2026/0091330 A1
- Screen with a gear rack for a shaker system22 Jan 2026US 2026/0021430 A1Schlumberger Technology Corporation
- Filtration container assemblies and methods15 May 2025US 2025/0153077 A1Grayl Inc.
- Meethod of operating a rake system8 May 2025US 2025/0144550 A1
Most cited
By later US patents
- Vibratory screening machine and non-clogging wear-reducing screen assembly therefor125US 5,221,008 ADerrick Manufacturing Corporation · 1993
- Vibrating screen unit78US 5,614,094 ADeister Machine Co., Inc. · 1997
- Rotary filtration device and filter pack therefor74US 5,254,250 AMembrex, Inc. · 1993
- Rotary disc filtration device73US 5,143,630 AMembrex, Inc. · 1992
- Undulating screen for vibratory screening machine65US 5,636,749 ADerrick Manufacturing Corporation · 1997