B01D 45/12
Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal
Official title: by centrifugal forces (centrifuges B04B; cyclones B04C)
B01D45/12 (Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal) appears on 2,639 US grants and 2,460 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,639
- Published applications
- 2,460
- Assignees
- 1,310
- Inventors
- 4,811
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 25 | 0 |
| 1978 | 29 | 0 |
| 1979 | 23 | 0 |
| 1980 | 32 | 0 |
| 1981 | 37 | 0 |
| 1982 | 24 | 0 |
| 1983 | 24 | 0 |
| 1984 | 21 | 0 |
| 1985 | 16 | 0 |
| 1986 | 18 | 0 |
| 1987 | 18 | 0 |
| 1988 | 15 | 0 |
| 1989 | 23 | 0 |
| 1990 | 20 | 0 |
| 1991 | 13 | 0 |
| 1992 | 18 | 0 |
| 1993 | 23 | 0 |
| 1994 | 21 | 0 |
| 1995 | 19 | 0 |
| 1996 | 21 | 0 |
| 1997 | 26 | 0 |
| 1998 | 33 | 0 |
| 1999 | 29 | 0 |
| 2000 | 34 | 0 |
| 2001 | 39 | 6 |
| 2002 | 46 | 50 |
| 2003 | 58 | 58 |
| 2004 | 44 | 58 |
| 2005 | 52 | 76 |
| 2006 | 41 | 62 |
| 2007 | 30 | 72 |
| 2008 | 44 | 65 |
| 2009 | 49 | 78 |
| 2010 | 71 | 80 |
| 2011 | 83 | 77 |
| 2012 | 59 | 88 |
| 2013 | 62 | 81 |
| 2014 | 75 | 102 |
| 2015 | 94 | 122 |
| 2016 | 81 | 133 |
| 2017 | 116 | 130 |
| 2018 | 91 | 152 |
| 2019 | 131 | 181 |
| 2020 | 172 | 170 |
| 2021 | 149 | 136 |
| 2022 | 143 | 125 |
| 2023 | 91 | 108 |
| 2024 | 98 | 99 |
| 2025 | 88 | 90 |
| 2026 | 38 | 61 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air-oil separator6 Oct 2026US 12,752,225 B2Pratt & Whitney Canada Corp.
- Systems and methods for rotating coalescers maintaining positive recirculation through a dynamic seal6 Oct 2026US 12,752,228 B2Atmus Filtration IP Inc.
- Systems and methods for producing olefins6 Oct 2026US 12,753,132 B2Dow Global Technologies LLC
- Repurposing fluidized catalytic cracking (FCC) systems to generate renewable fuel intermediate compositions6 Oct 2026US 12,753,350 B2Chevron U.S.A.Inc.
- Inducer assembly for a turbine engine29 Sep 2026US 12,746,491 B2General Electric Company
- Hair dryer and hair dryer operation mode selection system8 Oct 2026US 2026/0305789 A1Omachron Intellectual Property Inc.
- Liquid separator device and method of use1 Oct 2026US 2026/0295485 A1Pall Corporation
- Surface cleaning apparatus24 Sep 2026US 2026/0283435 A1Omachron Intellectual Property Inc.
- Liquid separator device and method of use24 Sep 2026US 2026/0284563 A1Pall Corporation
- Double-cyclone separator24 Sep 2026US 2026/0284677 A1
Most cited
By later US patents
- Vacuum cleaner having a cyclone type dust collecting apparatus333US 6,406,505 B1Samsung Kwangju Electronics Co., Ltd. · 2002
- Air filter cartridge305US 6,966,940 B2Donaldson Company, Inc. · 2005
- Upright vacuum cleaner with cyclonic air flow295US 6,782,585 B1Fantom Technologies Inc. · 2004
- Apparatus and method for separating particles from a cyclonic fluid flow270US 6,251,296 B1G. B. D. Corp. · 2001
- Apparatus and method separating particles from a cyclonic fluid flow including an apertured particle separation member within a cyclonic flow region240US 6,440,197 B1G. B. D. Corp. · 2002