B01D 25/28
Leaching or washing filter cakes in the filter handling the filter cake
Official title: Leaching or washing filter cakes in the filter {handling the filter cake for purposes other than regenerating}
B01D25/28 (Leaching or washing filter cakes in the filter handling the filter cake) appears on 166 US grants and 85 published applications in this corpus.
Search patents in B01D- Granted patents
- 166
- Published applications
- 85
- Assignees
- 94
- Inventors
- 234
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 10 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 2 |
| 2004 | 3 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 4 |
| 2007 | 1 | 4 |
| 2008 | 2 | 6 |
| 2009 | 1 | 2 |
| 2010 | 4 | 10 |
| 2011 | 4 | 3 |
| 2012 | 3 | 2 |
| 2013 | 6 | 5 |
| 2014 | 1 | 5 |
| 2015 | 3 | 4 |
| 2016 | 4 | 3 |
| 2017 | 1 | 1 |
| 2018 | 1 | 3 |
| 2019 | 4 | 2 |
| 2020 | 2 | 5 |
| 2021 | 3 | 2 |
| 2022 | 2 | 1 |
| 2023 | 0 | 5 |
| 2024 | 0 | 3 |
| 2025 | 4 | 1 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Mechanical demoisturizing of partially-decomposed organic material13 Jan 2026US 12,521,651 B2American Peat Technology, LLC
- Filter plate assembly for a filter press, and such a filter press30 Dec 2025US 12,508,524 B2Metso Finland Oy
- Filter plate frame assembly, a horizontal filter press, such as a tower press, having such a plate frame assembly, and a method of replacing worn components of horizontal filter press4 Nov 2025US 12,458,910 B2Metso Finland Oy
- Filter diaphragm for a recessed plate-type filter, a diaphragm filter plate, a diaphragm filter plate assembly and a recessed plate-type filter21 Oct 2025US 12,447,422 B2Metso Finland Oy
- Filter diaphragm for a horizontal plate and frame-type filter, such as a tower press7 Oct 2025US 12,434,176 B2Metso Finland Oy
- Loss-free process for producing cathode active material without generating waste and wastewater24 Sep 2026US 2026/0285703 A1
- Apparatus and process for recovery of a valuable material13 Aug 2026US 2026/0233129 A1Evonik Operations GmbH
- Method for producing dairy substitute products9 Jul 2026US 2026/0191217 A1Meura S.A.
- Diaphragm filter plate for a recessed plate -type filter15 Jan 2026US 2026/0014496 A1Metso Finland Oy
- Filtering machine of filter plate type1 Jan 2026US 2026/0001012 A1Mitsubishi Kakoki Kaisha, Ltd.
Most cited
By later US patents
- Method for isolation of nanomaterials40US 9,446,397 B2Siluria Technologies, Inc. · 2016
- Two piece frame and two piece diaphragm filter plate37US 6,149,806 A2000
- Filter press with alternating diaphragm squeeze chamber plates and filtration chamber plates35US 6,180,002 B2United States Filter Corporation · 2001
- Filter plate-and-diaphragm assemblies for a filter press27US 3,931,014 AEberhard Hoesch & Soehne · 1976
- Expressing filter plate for filter press of expression type27US 3,988,242 AKurita Machinery Manufacturing Company Limited · 1976