B01D 25/288
Retarding cake deposition on the filter during the filtration period
Official title: {Retarding cake deposition on the filter during the filtration period, e.g. using stirrers}
B01D25/288 (Retarding cake deposition on the filter during the filtration period) appears on 4 US grants and 2 published applications in this corpus.
Search patents in B01D- Granted patents
- 4
- Published applications
- 2
- Assignees
- 4
- Inventors
- 10
- Latest grant
- 19 Jul 2011
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 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 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Cross-flow filtration system19 Jul 2011US 7,980,395 B2Whirlpool Corporation
- Rotor for generating vortex water flow, and filtering apparatus employing the same23 Feb 2010US 7,666,305 B2Bookang Tech Co., Ltd.
- Separation device having abutment rings as an outer cover3 Apr 2001US 6,209,727 B1Valmet-Raisio Oy
- Filter press with rotor disks1 Nov 1988US 4,781,828 ABauko Baukooperation GmbH
Most cited
By later US patents
- Filter press with rotor disks7US 4,781,828 ABauko Baukooperation GmbH · 1988
- Separation device having abutment rings as an outer cover2US 6,209,727 B1Valmet-Raisio Oy · 2001
- Rotor for generating vortex water flow, and filtering apparatus employing the same2US 7,666,305 B2Bookang Tech Co., Ltd. · 2010
- Cross-flow filtration system2US 7,980,395 B2Whirlpool Corporation · 2011