B01D 24/4807
Handling the filter cake for purposes other than regenerating
Official title: {Handling the filter cake for purposes other than regenerating}
B01D24/4807 (Handling the filter cake for purposes other than regenerating) appears on 7 US grants and 4 published applications in this corpus.
Search patents in B01D- Granted patents
- 7
- Published applications
- 4
- Assignees
- 10
- Inventors
- 30
- Latest grant
- 3 Feb 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for filtering surface water with thin supernatant layer and implementing plant3 Feb 2004US 6,685,835 B1Aquatrium
- Method and apparatus for filtering a liquid7 May 2002US 6,383,376 B1Plasti-Drain Ltée
- Slow sand filter for use with intermittently flowing water supply and method of use thereof26 Sep 2000US 6,123,858 AUniversity Technologies International Inc.
- Apparatus for separating at least two elements contained in a liquid or gaseous fluid by means of an absorbent filtering material20 Nov 1990US 4,971,688 ACentre Technique Industriel: Institut Textile de France
- Process for continuous contacting of fluids and solids28 Feb 1989US 4,808,317 AAdvanced Separation Technologies Incorporated
- Filtration systems and methods of operation19 Jun 2025US 2025/0196026 A1Specialty Minerals (Michigan) Inc.
- Regeneration method for filtration apparatus, filtration apparatus and water treatment apparatus1 Feb 2018US 2018/0028946 A1Mitsubishi Heavy Industries, Ltd.
- Ceramic filter element and method for manufacturing a ceramic filter element27 Nov 2014US 2014/0346104 A1Outotec (Filters) Oy
- Filtration system28 May 2009US 2009/0134101 A1
Most cited
By later US patents
- Water filtration process and apparatus having upflow filter with buoyant filter media and downflow filter with nonbuoyant filter media70US 4,547,286 ANeptune Microfloc, Inc. · 1985
- Process for continuous contacting of fluids and solids53US 4,808,317 AAdvanced Separation Technologies Incorporated · 1989
- Slow sand filter for use with intermittently flowing water supply and method of use thereof20US 6,123,858 AUniversity Technologies International Inc. · 2000
- Apparatus for separating at least two elements contained in a liquid or gaseous fluid by means of an absorbent filtering material9US 4,971,688 ACentre Technique Industriel: Institut Textile de France · 1990
- Method and device for filtration4US 4,057,496 AFuji Photo Film Co., Ltd. · 1977