Y02A 50/2351
Atmospheric particulate matter [pm]
Official title: Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Y02A50/2351 (Atmospheric particulate matter [pm]) appears on 310 US grants and 288 published applications in this corpus.
Search patents in Y02A- Granted patents
- 310
- Published applications
- 288
- Assignees
- 225
- Inventors
- 730
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 3 |
| 2002 | 3 | 9 |
| 2003 | 7 | 6 |
| 2004 | 10 | 11 |
| 2005 | 4 | 9 |
| 2006 | 7 | 9 |
| 2007 | 6 | 10 |
| 2008 | 5 | 8 |
| 2009 | 5 | 4 |
| 2010 | 3 | 7 |
| 2011 | 3 | 9 |
| 2012 | 5 | 6 |
| 2013 | 5 | 11 |
| 2014 | 6 | 6 |
| 2015 | 4 | 7 |
| 2016 | 7 | 10 |
| 2017 | 7 | 13 |
| 2018 | 8 | 9 |
| 2019 | 11 | 19 |
| 2020 | 10 | 15 |
| 2021 | 15 | 21 |
| 2022 | 9 | 32 |
| 2023 | 10 | 26 |
| 2024 | 19 | 19 |
| 2025 | 10 | 5 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ash collecting system9 Jun 2026US 12,649,121 B2Beijing Zhong Xing Hui Rong NRG Saving Tech Co, Ltd
- Valve arrangement for an industrial dust extractor2 Jun 2026US 12,642,404 B2Husqvarna AB
- Active precleaner system and methods of use2 Jun 2026US 12,643,066 B2Donaldson Company, Inc.
- Electric dust collector and dust collection method using same12 May 2026US 12,623,232 B2Creative Technology Ltd
- Dust collecting mechanism, car air purifier and fan12 May 2026US 12,623,515 B2Suzhou BeiAng Smart Technology Co., Ltd.
- Filter material for air filter, and method for manufacturing same25 Jun 2026US 2026/0175152 A1Hokuetsu Corporation
- High-voltage electrostatic type air purification module and ionic wind air purifier18 Jun 2026US 2026/0166565 A1Guangdong Tongyuan Electric Appliance Co., Ltd
- Air filter for high-efficiency pm2.5 capture14 May 2026US 2026/0131270 A1The Board of Trustees of the Leland Stanford Junior University
- Method for preparing green-body chip of three-terminal multi-layer ceramic capacitive filter8 Jan 2026US 2026/0011491 A1Guangdong Viiyong Electronic Technology Co., Ltd.
- Method for manufacturing whirlwind generating apparatus for purifying contaminated air18 Sep 2025US 2025/0288936 A1
Most cited
By later US patents
- Filter arrangement; sealing system; and methods402US 6,190,432 B1Donaldson Company, Inc. · 2001
- Filter arrangement; sealing system; and methods288US 6,350,291 B1Donaldson Company, Inc. · 2002
- Compact dust filter assembly211US 4,395,269 ADonaldson Company, Inc. · 1983
- Method and apparatus for electrostatically cleaning particulates from air121US 5,330,559 AUnited Air Specialists, Inc. · 1994
- Two stage electrostatic precipitator with electric field induced airflow120US 4,231,766 AUnited Air Specialists, Inc. · 1980