B01D 25/325
Counter-current flushing
Official title: {counter-current flushing, e.g. by air bumps}
B01D25/325 (Counter-current flushing) appears on 34 US grants and 29 published applications in this corpus.
Search patents in B01D- Granted patents
- 34
- Published applications
- 29
- Assignees
- 15
- Inventors
- 34
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 5 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 1 | 3 |
| 2020 | 2 | 0 |
| 2021 | 1 | 3 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter cloth cleaning method of filter press13 Jan 2026US 12,521,652 B2Ishigaki Company Limited
- Filtering unit with improved cover assembly31 Oct 2023US 11,801,460 B2Alfa Laval Corporate AB
- Filter plate assembly for filter2 Feb 2021US 10,905,977 B2
- Filter for extruder press29 Sep 2020US 10,786,763 B2GreenField Specialty Alcohols Inc.
- Filtering unit with automatic backwashing23 Jun 2020US 10,688,414 B2Alfa Laval Corporate AB
- Sleeve for a filtering unit with backwashing30 Apr 2026US 2026/0115631 A1Alfa Laval Moatti
- Apparatus and method for cleaning filter plates19 Jun 2025US 2025/0196197 A1CSL Behring GmbH
- Filtering component for a filtering unit with backwashing18 Jul 2024US 2024/0238700 A1Alfa Laval Moatti
- Filter11 Jul 2024US 2024/0226776 A1Alfa Laval Moatti
- Filtering unit with improved cover assembly20 Oct 2022US 2022/0331715 A1Alfa Laval Corporate AB
Most cited
By later US patents
- Filter apparatus including stacked intake and discharge plates31US 5,549,824 AIng. A. Maurer S.A. · 1996
- Filtering apparatus26US 4,935,126 A1990
- Filter incorporating two distinct filtering stacks24US 4,592,838 AGeorges Moatti · 1986
- Self-cleaning filter with motor incorporated therewith22US 4,481,111 A1984
- Disk filter22US 4,707,258 A1987