B01D 46/02
Particle separators
Official title: Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
B01D46/02 (Particle separators) appears on 1,122 US grants and 801 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,122
- Published applications
- 801
- Assignees
- 635
- Inventors
- 2,101
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 22 | 0 |
| 1978 | 21 | 0 |
| 1979 | 19 | 0 |
| 1980 | 29 | 0 |
| 1981 | 58 | 0 |
| 1982 | 36 | 0 |
| 1983 | 22 | 0 |
| 1984 | 16 | 0 |
| 1985 | 16 | 0 |
| 1986 | 23 | 0 |
| 1987 | 15 | 0 |
| 1988 | 14 | 0 |
| 1989 | 18 | 0 |
| 1990 | 10 | 0 |
| 1991 | 13 | 0 |
| 1992 | 15 | 0 |
| 1993 | 16 | 0 |
| 1994 | 19 | 0 |
| 1995 | 15 | 0 |
| 1996 | 15 | 0 |
| 1997 | 19 | 0 |
| 1998 | 30 | 0 |
| 1999 | 21 | 0 |
| 2000 | 21 | 0 |
| 2001 | 23 | 6 |
| 2002 | 16 | 14 |
| 2003 | 22 | 25 |
| 2004 | 23 | 23 |
| 2005 | 17 | 21 |
| 2006 | 11 | 25 |
| 2007 | 11 | 22 |
| 2008 | 16 | 32 |
| 2009 | 11 | 43 |
| 2010 | 20 | 43 |
| 2011 | 31 | 26 |
| 2012 | 23 | 29 |
| 2013 | 25 | 32 |
| 2014 | 29 | 29 |
| 2015 | 26 | 27 |
| 2016 | 11 | 33 |
| 2017 | 23 | 38 |
| 2018 | 24 | 28 |
| 2019 | 30 | 46 |
| 2020 | 25 | 56 |
| 2021 | 30 | 41 |
| 2022 | 31 | 54 |
| 2023 | 31 | 33 |
| 2024 | 30 | 34 |
| 2025 | 32 | 22 |
| 2026 | 20 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control of evacuation stations8 Sep 2026US 12,727,729 B2iRobot Corporation
- Vapor displacement refueling including data communications, zero gravity and chemical looping combustion system25 Aug 2026US 12,718,682 B2
- Self-actuated cleaning head for an autonomous vacuum21 Jul 2026US 12,685,418 B2Matic Robots, Inc.
- Method for clean and low-carbon in-situ disposal of waste incineration fly ash14 Jul 2026US 12,678,726 B2Zhejiang University
- Ash collecting system9 Jun 2026US 12,649,121 B2Beijing Zhong Xing Hui Rong NRG Saving Tech Co, Ltd
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
- Filter systems with filter bag assemblies including filter bags with radial seal gaskets17 Sep 2026US 2026/0273447 A1Donaldson Company, Inc.
- In-situ regeneration of filter medium for improving catalytic efficiency10 Sep 2026US 2026/0264016 A1W. L. Gore & Associates, Inc.
- Filters and Filtration Systems30 Jul 2026US 2026/0216627 A1Walk Industrial, Inc.
- Power tool including an air filter and debris collector23 Jul 2026US 2026/0208088 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures252US 6,743,273 B2Donaldson Company, Inc. · 2004
- Method for removing pollutants from a combustor flue gas and system for same199US 5,505,766 AElectric Power Research, Inc. · 1996
- Polymeric fiber and glass fiber composite filter media175US 5,785,725 AJohns Manville International, Inc. · 1998
- Process if making fine fiber material131US 6,955,775 B2Donaldson Company, Inc. · 2005
- Method and apparatus for controlling the cleaning cycle of air filter elements and for predicting the useful life thereof121US 5,711,785 AOrmet Corporation · 1998