B01D 33/74
For discharging filtrate
Official title: for discharging filtrate
B01D33/74 (For discharging filtrate) appears on 185 US grants and 70 published applications in this corpus.
Search patents in B01D- Granted patents
- 185
- Published applications
- 70
- Assignees
- 134
- Inventors
- 277
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 10 | 0 |
| 1988 | 1 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 4 | 2 |
| 2003 | 1 | 2 |
| 2004 | 3 | 3 |
| 2005 | 2 | 1 |
| 2006 | 0 | 3 |
| 2007 | 4 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 3 | 2 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 3 | 6 |
| 2016 | 1 | 3 |
| 2017 | 2 | 3 |
| 2018 | 3 | 3 |
| 2019 | 2 | 6 |
| 2020 | 6 | 4 |
| 2021 | 3 | 4 |
| 2022 | 3 | 6 |
| 2023 | 3 | 6 |
| 2024 | 5 | 4 |
| 2025 | 4 | 0 |
| 2026 | 4 | 4 |
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
- Rotatable filter7 Apr 2026US 12,594,513 B2Rocker Scientific Co., Ltd.
- Drum washer with gravity assist drainage17 Feb 2026US 12,551,825 B2Andritz Inc.
- Continuous disc filter device25 Nov 2025US 12,478,903 B2Valmet Technologies Oy
- 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
- Device and method for separating a liquid from a feedstock23 Jul 2026US 2026/0208075 A1Herbold Meckesheim GmbH
- Centrifugal solids-liquid separator system19 Feb 2026US 2026/0048348 A1
- Adjustable receptacles26 Sep 2024US 2024/0316482 A1Process Wastewater Technologies, LLC
Most cited
By later US patents
- Vibratory screening machine and non-clogging wear-reducing screen assembly therefor125US 5,221,008 ADerrick Manufacturing Corporation · 1993
- Screen basket and shale shakers61US 7,216,767 B2Varco I/P, Inc. · 2007
- Rotary filter separator54US 4,040,965 AFirma Supraton Aurer & Zucker OHG · 1977
- Installation for the mechanical-biological purification of waste water50US 4,090,965 AMecafina S.A. · 1978
- Vibratory separators and screens48US 6,722,504 B2Varco I/P, Inc. · 2004