B01D 33/06
Filters with filtering elements which move during the filtering operation: with rotary
Official title: with rotary cylindrical filtering surfaces, e.g. hollow drums (B01D33/044 takes precedence {; rotating drums for paper-making D21B})
B01D33/06 (Filters with filtering elements which move during the filtering operation: with rotary) appears on 857 US grants and 488 published applications in this corpus.
Search patents in B01D- Granted patents
- 857
- Published applications
- 488
- Assignees
- 491
- Inventors
- 1,384
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 16 | 0 |
| 1978 | 14 | 0 |
| 1979 | 19 | 0 |
| 1980 | 22 | 0 |
| 1981 | 28 | 0 |
| 1982 | 17 | 0 |
| 1983 | 13 | 0 |
| 1984 | 19 | 0 |
| 1985 | 21 | 0 |
| 1986 | 15 | 0 |
| 1987 | 23 | 0 |
| 1988 | 13 | 0 |
| 1989 | 23 | 0 |
| 1990 | 19 | 0 |
| 1991 | 14 | 0 |
| 1992 | 22 | 0 |
| 1993 | 21 | 0 |
| 1994 | 12 | 0 |
| 1995 | 24 | 0 |
| 1996 | 21 | 0 |
| 1997 | 24 | 0 |
| 1998 | 18 | 0 |
| 1999 | 19 | 0 |
| 2000 | 14 | 0 |
| 2001 | 22 | 6 |
| 2002 | 16 | 11 |
| 2003 | 19 | 9 |
| 2004 | 10 | 18 |
| 2005 | 8 | 12 |
| 2006 | 11 | 14 |
| 2007 | 9 | 19 |
| 2008 | 9 | 7 |
| 2009 | 3 | 11 |
| 2010 | 8 | 14 |
| 2011 | 5 | 9 |
| 2012 | 9 | 17 |
| 2013 | 11 | 12 |
| 2014 | 11 | 18 |
| 2015 | 14 | 36 |
| 2016 | 14 | 27 |
| 2017 | 16 | 27 |
| 2018 | 21 | 28 |
| 2019 | 29 | 37 |
| 2020 | 30 | 31 |
| 2021 | 20 | 21 |
| 2022 | 24 | 32 |
| 2023 | 17 | 20 |
| 2024 | 19 | 21 |
| 2025 | 16 | 19 |
| 2026 | 14 | 12 |
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
- Filter unit lifting system21 Jul 2026US 12,685,949 B2Veolia Water Solutions & Technologies Support
- Filter unit for filtering microparticles and a filter cage for use in a filter unit21 Jul 2026US 12,686,964 B2Xeros Limited
- 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
- Filtration apparatus and method of controlling filtration apparatus1 Oct 2026US 2026/0295479 A1Renasys AS
- Filter for a treatment apparatus6 Aug 2026US 2026/0225010 A1Fresh Works Ltd
- Filter screen, tubular filter and filter device30 Jul 2026US 2026/0216624 A1Maag Ettlinger GmbH
- Algae harvesting device23 Jul 2026US 2026/0206700 A1University of Technology, Sydney
- Device and method for separating a liquid from a feedstock23 Jul 2026US 2026/0208075 A1Herbold Meckesheim GmbH
Most cited
By later US patents
- Centrifugal filtration device93US 6,517,612 B1Gore Enterprise Holdings, Inc. · 2003
- Filtration method and apparatus86US 4,790,942 AMembrex, Inc. · 1988
- Small volume rotary filter86US 4,876,013 AMembrex, Inc. · 1989
- Rotary drum filter with reciprocating nozzle means70US 5,470,472 ADorr-Oliver Incorporated · 1995
- Self-cleaning filter and vortexer68US 4,108,778 A1978