B01D 33/50
With backwash arms, shoes or nozzles
Official title: with backwash arms, shoes or nozzles
B01D33/50 (With backwash arms, shoes or nozzles) appears on 298 US grants and 171 published applications in this corpus.
Search patents in B01D- Granted patents
- 298
- Published applications
- 171
- Assignees
- 183
- Inventors
- 483
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 12 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 5 | 0 |
| 1999 | 11 | 0 |
| 2000 | 4 | 0 |
| 2001 | 12 | 2 |
| 2002 | 4 | 5 |
| 2003 | 7 | 4 |
| 2004 | 5 | 1 |
| 2005 | 1 | 4 |
| 2006 | 3 | 5 |
| 2007 | 2 | 2 |
| 2008 | 2 | 2 |
| 2009 | 1 | 10 |
| 2010 | 2 | 5 |
| 2011 | 2 | 5 |
| 2012 | 7 | 7 |
| 2013 | 4 | 9 |
| 2014 | 6 | 10 |
| 2015 | 10 | 16 |
| 2016 | 7 | 9 |
| 2017 | 3 | 9 |
| 2018 | 6 | 8 |
| 2019 | 11 | 9 |
| 2020 | 10 | 10 |
| 2021 | 6 | 8 |
| 2022 | 7 | 9 |
| 2023 | 6 | 7 |
| 2024 | 4 | 8 |
| 2025 | 6 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of filtrating liquid, and filtration apparatus for filtrating liquid25 Aug 2026US 12,714,956 B2Renasys AS
- Disc filter having a suction device, and method for filtering fluids using a disc filter3 Mar 2026US 12,564,803 B2Mecana AG
- Automatic self-cleaning backwash strainer21 Oct 2025US 12,447,424 B2The Hellen Strainer Company
- Spiral conveyor and filter unit19 Aug 2025US 12,390,897 B2Tokyo Seimitsu Hatsujo Co., Ltd.
- Industrialized fish and algae farming system and method with recirculating water5 Aug 2025US 12,376,572 B2Qinghai Photon Ecology Co., Ltd.
- Algae harvesting device23 Jul 2026US 2026/0206700 A1University of Technology, Sydney
- Backwash Orifice Arrangement18 Jun 2026US 2026/0166455 A1Xylem Water Solution U.S.A., Inc.
- Rotary Disc Filter Having a High Pressure Media Cleaning System21 May 2026US 2026/0138065 A1Veolia Water Solutions & Technologies Support
- Device for cleaning and/or suctioning pile fibers for pile cloth filtration11 Dec 2025US 2025/0375725 A1Mecana AG
- Separable two-stage vertical suction cleaning apparatus and fiber disk filter including the same5 Jun 2025US 2025/0177890 A1Yucheon Enviro Co., Ltd.
Most cited
By later US patents
- Method and apparatus for cleaning filter material in a filter apparatus utilizing a suction generating nozzle99US 5,951,878 AAqua-Aerobic Systems, Inc. · 1999
- Apparatus and method for separation of solids from liquid82US 5,814,230 A1998
- Apparatus for mechanical purification of waste water54US 4,639,315 AMecapec S.A. · 1987
- Installation for the mechanical-biological purification of waste water50US 4,090,965 AMecafina S.A. · 1978
- Gumbo separator50US 5,921,399 ADerrick Corporation · 1999