B01D 33/27
Filters with filtering elements which move during the filtering operation: with rotary
Official title: with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
B01D33/27 (Filters with filtering elements which move during the filtering operation: with rotary) appears on 126 US grants and 54 published applications in this corpus.
Search patents in B01D- Granted patents
- 126
- Published applications
- 54
- Assignees
- 72
- Inventors
- 170
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 1 |
| 2002 | 4 | 2 |
| 2003 | 4 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 4 |
| 2012 | 0 | 3 |
| 2013 | 2 | 1 |
| 2014 | 3 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 6 |
| 2017 | 2 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 2 |
| 2020 | 2 | 5 |
| 2021 | 3 | 4 |
| 2022 | 4 | 5 |
| 2023 | 2 | 0 |
| 2024 | 3 | 6 |
| 2025 | 2 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sand and solids bypass separator14 Jul 2026US 12,680,439 B2
- Pyrolysis reactor system and method25 Nov 2025US 12,480,055 B2Duke Technologies, LLC
- Microplastic filter for washing machines or other appliances30 Sep 2025US 12,427,453 B2Samsung Electronics Co., Ltd.
- Screen cylinder22 Oct 2024US 12,123,141 B2Aikawa Fiber Technologies Oy
- Unpowered-filtering sewage cleaning device6 Aug 2024US 12,054,901 B1Farmland Irrigation Research Institute, CAAS
- Grinder machine with improved screen diverter system26 Feb 2026US 2026/0054269 A1Franklin Miller, Inc.
- Pyrolysis Reactor System and Method12 Sep 2024US 2024/0301294 A1Duke Technologies, LLC
- Sludge treatment apparatus and excreta treatment apparatus including same8 Aug 2024US 2024/0262733 A1Samsung Electronics Co., Ltd.
- Unpowered-filtering sewage cleaning device8 Aug 2024US 2024/0263415 A1Farmland Irrigation Research Institute, CAAS
- Microplastic filter for washing machines or other appliances30 May 2024US 2024/0173655 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Fluid processing apparatus65US 3,997,447 AComposite Sciences, Inc. · 1976
- Conical screen basket centrifuge53US 5,378,364 ABaker Hughes Incorporated · 1995
- Single pass mud rejuvenation system and method50US 4,639,258 A1987
- Separation of solids from liquids by screening47US 4,236,999 AContra-Shear Holdings Limited · 1980
- Pipeline sieve with a suction removal device38US 4,867,879 ATaprogge Gesellschaft mbH · 1989