B01D 2201/38
Preventing rewetting of the filter cake on the filter media
B01D2201/38 (Preventing rewetting of the filter cake on the filter media) appears on 7 US grants and 0 published applications in this corpus.
Search patents in B01D- Granted patents
- 7
- Published applications
- 0
- Assignees
- 6
- Inventors
- 14
- Latest grant
- 8 Oct 2002
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dewatering device8 Oct 2002US 6,461,505 B1Valmet Fibertech AB
- Apparatus and process for separating components of a treatment mixture from waste water treatment system27 Mar 2001US 6,206,203 B1Novus International, Inc.
- Treatment process for recovering components of a float material from waste water5 Sep 2000US 6,113,800 ANovus International, Inc.
- Apparatus for dewatering and or washing papermaking stock7 Jan 1997US 5,591,336 AThe Black Clawson Company
- Anti-rewet deck for press rolls28 Nov 1995US 5,470,471 AIngersoll-Rand Company
No published applications in this class yet.
Most cited
By later US patents
- Treatment process for recovering components of a float material from waste water14US 6,113,800 ANovus International, Inc. · 2000
- Dewatering device13US 6,461,505 B1Valmet Fibertech AB · 2002
- Filtrate run-back baffle for rotary drum vacuum filter9US 4,581,139 ADorr-Oliver Incorporated · 1986
- Sludge filtering device and grid system8US 5,240,609 AEnviroquip, Inc. · 1993
- Anti-rewet deck for press rolls6US 5,470,471 AIngersoll-Rand Company · 1995