B01D 2201/14
Particulate filter materials with a lower density than the liquid mixture to
Official title: Particulate filter materials with a lower density than the liquid mixture to be filtered
B01D2201/14 (Particulate filter materials with a lower density than the liquid mixture to) appears on 31 US grants and 2 published applications in this corpus.
Search patents in B01D- Granted patents
- 31
- Published applications
- 2
- Assignees
- 21
- Inventors
- 69
- Latest grant
- 10 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and method for rejuvenation and recovery of filtration media10 May 2022US 11,325,058 B2The Penn State Research Foundation
- Waste-movement system for aquarium21 May 2019US 10,292,373 B2
- Separation of clean water from effluent streams1 May 2018US 9,956,563 B1
- Filter system and a cartridge containing a cellular granular material9 Nov 1999US 5,980,761 A
- Method and apparatus for water treatment16 Jun 1998US 5,766,488 AUnited States Filter Corporation
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
- Method and apparatus for separating suspended solids from liquids47US 4,743,382 AState of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University · 1988
- Method and apparatus for water treatment40US 5,766,488 AUnited States Filter Corporation · 1998
- Water filtration apparatus having upflow buoyant media filter and downflow nonbuoyant media filter37US 4,608,181 ANeptune Microfloc, Inc. · 1986
- Method for backwashing water processing systems32US 5,750,041 A1998