B01D 35/15
Bidirectional working filters
B01D35/15 (Bidirectional working filters) appears on 36 US grants and 17 published applications in this corpus.
Search patents in B01D- Granted patents
- 36
- Published applications
- 17
- Assignees
- 26
- Inventors
- 54
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 3 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Valves for filter driers and bi-flow filter driers including the same23 Sep 2025US 12,420,220 B2Copeland Comfort Control LP
- Device and method for filtering a fluid circulating in a plumbing and heating system29 Jul 2025US 12,370,476 B2I.V.A.R. S.P.A.
- Apparatus for the transfer and distribution of bulk liquids14 Jan 2025US 12,195,322 B2Parrish Enterprises, Ltd.
- Ruggedized portable water treatment system23 Jan 2024US 11,878,917 B2Blu Technology LLC
- Filter for the treatment of a fluid in a heating and/or cooling system28 Nov 2023US 11,826,679 B2R.B.M. S.P.A.
- Valves For Filter Driers And Bi-Flow Filter Driers Including The Same27 Nov 2025US 2025/0360443 A1Copeland Comfort Control LP
- Valves for filter driers and bi-flow filter driers including the same28 Mar 2024US 2024/0100454 A1Emerson Electric Co.
- Apparatus for the transfer and distribution of bulk liquids5 Oct 2023US 2023/0312331 A1Parrish Enterprises, Ltd.
- Ruggedized portable water treatment system15 Sep 2022US 2022/0289593 A1Created To C, LLC
- Filter for the Treatment of a Fluid in a Heating and/or Cooling System10 Mar 2022US 2022/0072453 A1Rbm Ibox S.R.L.
Most cited
By later US patents
- Filter body having closely adjacent filter material57US 4,732,678 AWix Corporation · 1988
- Filter apparatus39US 4,882,061 ACuno Incorporated · 1989
- Filter element shutoff valve36US 4,222,875 ADeere & Company · 1980
- Biflow drier with improved filtration25US 6,235,192 B1Parker-Hannifin Corporation · 2001
- Bi-directional filter drier23US 4,192,751 AEmerson Electric Co. · 1980