A62B 23/00
Filters for breathing-protection purposes
Official title: Filters for breathing-protection purposes (gas-filters in general B01D)
A62B23/00 (Filters for breathing-protection purposes) appears on 1,255 US grants and 2,090 published applications in this corpus.
Search patents in A62B- Granted patents
- 1,255
- Published applications
- 2,090
- Assignees
- 801
- Inventors
- 3,732
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 16 | 0 |
| 1990 | 10 | 0 |
| 1991 | 15 | 0 |
| 1992 | 14 | 0 |
| 1993 | 5 | 0 |
| 1994 | 13 | 0 |
| 1995 | 16 | 0 |
| 1996 | 11 | 0 |
| 1997 | 20 | 0 |
| 1998 | 23 | 0 |
| 1999 | 9 | 0 |
| 2000 | 17 | 0 |
| 2001 | 17 | 5 |
| 2002 | 19 | 7 |
| 2003 | 14 | 26 |
| 2004 | 26 | 39 |
| 2005 | 14 | 36 |
| 2006 | 26 | 43 |
| 2007 | 18 | 53 |
| 2008 | 13 | 36 |
| 2009 | 12 | 47 |
| 2010 | 16 | 40 |
| 2011 | 20 | 50 |
| 2012 | 26 | 43 |
| 2013 | 25 | 33 |
| 2014 | 16 | 37 |
| 2015 | 26 | 63 |
| 2016 | 30 | 56 |
| 2017 | 29 | 79 |
| 2018 | 22 | 72 |
| 2019 | 32 | 62 |
| 2020 | 62 | 81 |
| 2021 | 77 | 298 |
| 2022 | 103 | 329 |
| 2023 | 84 | 277 |
| 2024 | 103 | 165 |
| 2025 | 107 | 65 |
| 2026 | 85 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter unit with a filter block, a damping layer and a housing, and process of manufacturing such a filter unit6 Oct 2026US 12,752,136 B2Dräger Safety AG & Co. KGaA
- Respiratory muscle strengthening device22 Sep 2026US 12,741,174 B2Ghinnotek Co., Ltd.
- Personal protective anti-viral face mask15 Sep 2026US 12,734,378 B2lowa State University Research Foundation, Inc.
- Preparation method of bismuth ion filter membrane and application thereof15 Sep 2026US 12,734,470 B2Work Together Marketing Consultant Limited
- System and method for absorbing moisture within a face mask8 Sep 2026US 12,727,632 B2Honeywell Safety Products USA, Inc.
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Mask with translucent flap1 Oct 2026US 2026/0295311 A1Makrite Industries Inc.
- Mask and a powered respirator device24 Sep 2026US 2026/0284449 A1
- Sanitary mask sheet17 Sep 2026US 2026/0272077 A1Kao Corporation
- Reusable face mask17 Sep 2026US 2026/0273313 A1Air Flo Labs, LLC
Most cited
By later US patents
- Nasal breathing apparatus and methods444US 6,561,188 B12003
- Melt-blown fibrous electrets387US 4,215,682 AMinnesota Mining and Manufacturing Company · 1980
- Particle-loaded microfiber sheet product and respirators made therefrom339US 3,971,373 AMinnesota Mining and Manufacturing Company · 1976
- Device for delivering aerosol to the nasal membranes and method of use291US 5,437,267 A1995
- Method of charging electret filter media289US 5,496,507 AMinnesota Mining and Manufacturing Company · 1996