B01D 33/067
Construction of the filtering drums
Official title: Construction of the filtering drums, e.g. mounting or sealing arrangements
B01D33/067 (Construction of the filtering drums) appears on 216 US grants and 140 published applications in this corpus.
Search patents in B01D- Granted patents
- 216
- Published applications
- 140
- Assignees
- 151
- Inventors
- 364
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 2 |
| 2002 | 5 | 7 |
| 2003 | 8 | 1 |
| 2004 | 2 | 6 |
| 2005 | 1 | 5 |
| 2006 | 5 | 5 |
| 2007 | 3 | 5 |
| 2008 | 3 | 2 |
| 2009 | 2 | 3 |
| 2010 | 1 | 1 |
| 2011 | 1 | 3 |
| 2012 | 2 | 6 |
| 2013 | 3 | 4 |
| 2014 | 4 | 4 |
| 2015 | 5 | 11 |
| 2016 | 4 | 9 |
| 2017 | 6 | 4 |
| 2018 | 5 | 10 |
| 2019 | 11 | 11 |
| 2020 | 9 | 8 |
| 2021 | 6 | 7 |
| 2022 | 9 | 11 |
| 2023 | 7 | 6 |
| 2024 | 5 | 3 |
| 2025 | 4 | 3 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Self-cleaning intake filter9 Jun 2026US 12,649,118 B2Wairere Research Limited
- Drum washer with gravity assist drainage17 Feb 2026US 12,551,825 B2Andritz Inc.
- Rotary drum filtering machine for algae filtration10 Feb 2026US 12,544,693 B2Algaecore Technologies Ltd
- Filter panel with lattice support structure for filter drum28 Oct 2025US 12,453,933 B2Etablissements Faivre
- Rotary pressure filter20 May 2025US 12,303,812 B2BHS-Sonthofen GmbH
- Filtration apparatus and method of controlling filtration apparatus1 Oct 2026US 2026/0295479 A1Renasys AS
- Filter screen, tubular filter and filter device30 Jul 2026US 2026/0216624 A1Maag Ettlinger GmbH
- A filtration unit assembly and a filtration system9 Jul 2026US 2026/0192219 A1Council of Scientific and Industrial Research
- Filtering apparatus, filtering method, and water treatment system10 Jul 2025US 2025/0222378 A1National University Corporation Tokai National Higher Education and Research System
- Centrifuge rotor self-balancing apparatus15 May 2025US 2025/0153194 A1Andritz Separation Inc.
Most cited
By later US patents
- Centrifugal filtration device93US 6,517,612 B1Gore Enterprise Holdings, Inc. · 2003
- Rotary drum type device for separating solid particles from a liquid59US 5,618,424 ANagaoka International Corporation · 1997
- Installation for the mechanical-biological purification of waste water50US 4,090,965 AMecafina S.A. · 1978
- Separation of solids from liquids by screening47US 4,236,999 AContra-Shear Holdings Limited · 1980
- Apparatus and methods for separating solids from flowing liquids or gases43US 6,511,595 B22003