B01D 36/02
Combinations of filters of different kinds
Official title: Combinations of filters of different kinds (B01D29/50, B01D33/35 take precedence)
B01D36/02 (Combinations of filters of different kinds) appears on 295 US grants and 182 published applications in this corpus.
Search patents in B01D- Granted patents
- 295
- Published applications
- 182
- Assignees
- 213
- Inventors
- 626
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 13 | 0 |
| 1992 | 14 | 0 |
| 1993 | 16 | 0 |
| 1994 | 11 | 0 |
| 1995 | 9 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 0 |
| 2002 | 8 | 8 |
| 2003 | 10 | 8 |
| 2004 | 5 | 9 |
| 2005 | 6 | 9 |
| 2006 | 6 | 7 |
| 2007 | 3 | 3 |
| 2008 | 3 | 4 |
| 2009 | 1 | 1 |
| 2010 | 2 | 0 |
| 2011 | 2 | 3 |
| 2012 | 2 | 2 |
| 2013 | 1 | 2 |
| 2014 | 2 | 8 |
| 2015 | 2 | 1 |
| 2016 | 3 | 6 |
| 2017 | 5 | 5 |
| 2018 | 2 | 9 |
| 2019 | 3 | 6 |
| 2020 | 6 | 12 |
| 2021 | 10 | 12 |
| 2022 | 6 | 8 |
| 2023 | 7 | 15 |
| 2024 | 12 | 19 |
| 2025 | 4 | 11 |
| 2026 | 7 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Water treatment unit comprising a plurality of filtration devices26 May 2026US 12,637,368 B2Inovaya
- Shipping container-mountable system for making bio-sourced oil dielectric fluids19 May 2026US 12,629,642 B2Cargill, Incorporated
- Metal working fluid decontamination apparatus21 Apr 2026US 12,605,474 B2
- Method of making a cartridge filter7 Apr 2026US 12,594,527 B2A. O. Smith Corporation
- Portable dialysis system31 Mar 2026US 12,589,192 B2Quanta Dialysis Technologies Limited
- Cmp slurry reuse optimization system through convergence and complex processing technology17 Sep 2026US 2026/0275160 A1SK hynix Inc.
- Potato protein extraction apparatus and method27 Aug 2026US 2026/0250314 A1Root Extracts Limited
- Outflow filter assembly for a water filtration system and a method therefor13 Aug 2026US 2026/0233131 A1
- Metal working fluid decontamination apparatus6 Aug 2026US 2026/0224763 A1
- Filter unit with particle filter and ion exchanger and cooling circuit with filter unit16 Jul 2026US 2026/0204599 A1Mann+Hummel GmbH
Most cited
By later US patents
- Process and apparatus for removing impurities from water used in food processing utilizing a mixture of ozone and air90US 5,053,140 AAmerican Water Purification, Inc. · 1991
- Water processor having automatic shutoff and bypass means87US 4,681,677 AOlin Corporation · 1987
- Storm water filtration system for use with conventional storm water collection sewers78US 5,133,619 A1992
- Liquid filter72US 5,538,626 AIng. Walter Hengst GmbH & Co. KG · 1996
- Multi-function filter cartridge with flow distribution control71US 5,106,501 AAmetek, Inc. · 1992