B01D 29/94
For discharging the filter cake
Official title: for discharging the filter cake, e.g. chutes
B01D29/94 (For discharging the filter cake) appears on 345 US grants and 130 published applications in this corpus.
Search patents in B01D- Granted patents
- 345
- Published applications
- 130
- Assignees
- 216
- Inventors
- 586
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 8 | 0 |
| 1980 | 0 | 0 |
| 1981 | 9 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 11 | 0 |
| 1985 | 10 | 0 |
| 1986 | 13 | 0 |
| 1987 | 9 | 0 |
| 1988 | 11 | 0 |
| 1989 | 13 | 0 |
| 1990 | 11 | 0 |
| 1991 | 16 | 0 |
| 1992 | 13 | 0 |
| 1993 | 12 | 0 |
| 1994 | 11 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 13 | 3 |
| 2002 | 9 | 2 |
| 2003 | 8 | 6 |
| 2004 | 4 | 2 |
| 2005 | 4 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 2 | 3 |
| 2011 | 3 | 4 |
| 2012 | 1 | 5 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 5 | 5 |
| 2016 | 3 | 6 |
| 2017 | 1 | 11 |
| 2018 | 4 | 4 |
| 2019 | 8 | 13 |
| 2020 | 2 | 6 |
| 2021 | 8 | 8 |
| 2022 | 9 | 8 |
| 2023 | 3 | 11 |
| 2024 | 8 | 12 |
| 2025 | 8 | 9 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for processing substrate22 Sep 2026US 12,741,239 B2Semes Co., Ltd.
- Rotary filter and associated filtering method31 Mar 2026US 12,589,340 B2Gaudfrin
- Multi-plate or laminated screw press10 Mar 2026US 12,569,787 B2
- End material recovery apparatus13 Jan 2026US 12,521,654 B2Kioxia Corporation
- Continuous trichome separation11 Nov 2025US 12,465,877 B1Amalgam LLC
- Petroleum self-cleaning filtration device and composite pumping joint11 Jun 2026US 2026/0158422 A1Shaanxi Yinhe Petroleum Engineering Technology Services Ltd.
- Methods and apparatus for spin down filter with electromagnetic fields19 Feb 2026US 2026/0048349 A1
- Robotic pool cleaner27 Nov 2025US 2025/0361740 A1Xingmai Innovation Technology (Suzhou) Co., Ltd.
- Microparticles filter device for a laundry washing machine, the device being provided with a cleaning device and method for removing the cleaning device23 Oct 2025US 2025/0327236 A1Electrolux Appliances Aktiebolag
- Mechanical Sludge Thickener System and Method Thereof16 Oct 2025US 2025/0320147 A1
Most cited
By later US patents
- Cross-flow filtration device with filtrate flow conduits and method of forming same150US 4,781,831 A1988
- Refuse collecting frame for sewer91US 5,284,580 A1994
- System for filtering liquids in a catch basin using filters in series and overflow channels87US 5,223,154 AEmcon Northwest, Inc. · 1993
- Method and apparatus for collecting, defluidizing and disposing of oil and gas well drill cuttings77US 6,170,580 B22001
- Rotary filtration device and filter pack therefor74US 5,254,250 AMembrex, Inc. · 1993