B01D 33/70
Filters with filtering elements which move during the filtering operation: having feed
Official title: having feed or discharge devices (B01D33/82 takes precedence)
B01D33/70 (Filters with filtering elements which move during the filtering operation: having feed) appears on 599 US grants and 278 published applications in this corpus.
Search patents in B01D- Granted patents
- 599
- Published applications
- 278
- Assignees
- 377
- Inventors
- 950
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 14 | 0 |
| 1979 | 13 | 0 |
| 1980 | 15 | 0 |
| 1981 | 21 | 0 |
| 1982 | 14 | 0 |
| 1983 | 7 | 0 |
| 1984 | 13 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 17 | 0 |
| 1988 | 9 | 0 |
| 1989 | 17 | 0 |
| 1990 | 25 | 0 |
| 1991 | 17 | 0 |
| 1992 | 23 | 0 |
| 1993 | 25 | 0 |
| 1994 | 16 | 0 |
| 1995 | 23 | 0 |
| 1996 | 21 | 0 |
| 1997 | 19 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 9 | 2 |
| 2002 | 7 | 6 |
| 2003 | 10 | 6 |
| 2004 | 7 | 12 |
| 2005 | 6 | 7 |
| 2006 | 8 | 9 |
| 2007 | 7 | 13 |
| 2008 | 4 | 7 |
| 2009 | 2 | 5 |
| 2010 | 5 | 8 |
| 2011 | 3 | 10 |
| 2012 | 7 | 8 |
| 2013 | 7 | 12 |
| 2014 | 9 | 10 |
| 2015 | 12 | 26 |
| 2016 | 8 | 13 |
| 2017 | 12 | 20 |
| 2018 | 10 | 11 |
| 2019 | 19 | 14 |
| 2020 | 13 | 16 |
| 2021 | 13 | 10 |
| 2022 | 11 | 17 |
| 2023 | 8 | 12 |
| 2024 | 8 | 5 |
| 2025 | 11 | 10 |
| 2026 | 5 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Discharge technology for plastic filters26 May 2026US 12,636,823 B2Ettlinger Kunststoffmaschinen GmbH
- Filter for a treatment apparatus21 Apr 2026US 12,605,658 B2Fresh Works Ltd
- Conveyor-belt filtering device for mechanically cleaning a liquid21 Apr 2026US 12,605,659 B2FSM Frankenberger GmbH
- Rotatable filter7 Apr 2026US 12,594,513 B2Rocker Scientific Co., Ltd.
- Drum washer with gravity assist drainage17 Feb 2026US 12,551,825 B2Andritz Inc.
- Apparatus and method for solid-liquid separation13 Aug 2026US 2026/0233134 A1Betolar Oyj
- Filter for a treatment apparatus6 Aug 2026US 2026/0225010 A1Fresh Works Ltd
- 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
- Machine chip and coolant flow cleaning system for endless belt conveyor9 Jul 2026US 2026/0192409 A1Mayfran International B.V.
Most cited
By later US patents
- Vibratory screening machine and non-clogging wear-reducing screen assembly therefor125US 5,221,008 ADerrick Manufacturing Corporation · 1993
- Filtration method and apparatus86US 4,790,942 AMembrex, Inc. · 1988
- Small volume rotary filter86US 4,876,013 AMembrex, Inc. · 1989
- Solids screens74US 4,820,407 ACPI Sales, Inc. · 1989
- Rotary filtration device and filter pack therefor74US 5,254,250 AMembrex, Inc. · 1993