B01D 50/20
Combinations of devices covered by groups b01d45/00 and b01d46/00
Official title: Combinations of devices covered by groups B01D45/00 and B01D46/00
B01D50/20 (Combinations of devices covered by groups b01d45/00 and b01d46/00) appears on 1,296 US grants and 1,203 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,296
- Published applications
- 1,203
- Assignees
- 675
- Inventors
- 2,316
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 16 | 0 |
| 1981 | 19 | 0 |
| 1982 | 11 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 9 | 0 |
| 1986 | 8 | 0 |
| 1987 | 17 | 0 |
| 1988 | 15 | 0 |
| 1989 | 15 | 0 |
| 1990 | 16 | 0 |
| 1991 | 13 | 0 |
| 1992 | 9 | 0 |
| 1993 | 17 | 0 |
| 1994 | 12 | 0 |
| 1995 | 14 | 0 |
| 1996 | 13 | 0 |
| 1997 | 21 | 0 |
| 1998 | 16 | 0 |
| 1999 | 12 | 0 |
| 2000 | 14 | 0 |
| 2001 | 18 | 10 |
| 2002 | 23 | 23 |
| 2003 | 32 | 30 |
| 2004 | 27 | 28 |
| 2005 | 17 | 38 |
| 2006 | 22 | 23 |
| 2007 | 20 | 20 |
| 2008 | 15 | 21 |
| 2009 | 18 | 30 |
| 2010 | 26 | 54 |
| 2011 | 32 | 26 |
| 2012 | 32 | 32 |
| 2013 | 21 | 43 |
| 2014 | 32 | 59 |
| 2015 | 52 | 44 |
| 2016 | 48 | 82 |
| 2017 | 54 | 67 |
| 2018 | 46 | 85 |
| 2019 | 69 | 98 |
| 2020 | 95 | 80 |
| 2021 | 78 | 67 |
| 2022 | 66 | 68 |
| 2023 | 55 | 55 |
| 2024 | 45 | 49 |
| 2025 | 42 | 33 |
| 2026 | 19 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air conditioning and filtration system29 Sep 2026US 12,746,502 B2Work Air Technologies Pty Ltd
- Combined manifolding and gas-liquid separation15 Sep 2026US 12,734,469 B2Electric Hydrogen Co.
- Surface cleaning apparatus8 Sep 2026US 12,727,731 B2Omachron Intellectual Property Inc.
- Integration chamber for mixing booth discharge gas and oven discharge gas and VOC removal system utilizing the same18 Aug 2026US 12,710,231 B2Hyundai Motor Company
- Separator for a multi-phase flow11 Aug 2026US 12,702,944 B2Innsep AS
- Hair dryer and hair dryer operation mode selection system8 Oct 2026US 2026/0305789 A1Omachron Intellectual Property Inc.
- Surface cleaning apparatus24 Sep 2026US 2026/0283435 A1Omachron Intellectual Property Inc.
- Active precleaner system and methods of use24 Sep 2026US 2026/0284565 A1Donaldson Company, Inc.
- Separator for a fluid cleaning device24 Sep 2026US 2026/0284678 A1Dyson Technology Limited
- Ventilation and Particulate Matter Removal System20 Aug 2026US 2026/0240381 A1
Most cited
By later US patents
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001
- Air filter cartridge305US 6,966,940 B2Donaldson Company, Inc. · 2005
- Fluid filtration device and system265US 9,867,914 B2Buffalo Filter LLC · 2018
- Vacuum filter257US 5,230,722 AAmway Corporation · 1993
- Pressure side integrated air filter and filtering networks for engines222US 5,472,463 ACummins Engine Company, Inc. · 1995