B01D 53/92
Of engine exhaust gases
Official title: of engine exhaust gases (exhaust {or silencing} apparatus {for internal combustion engines, machines or engines in general}, having means for purifying, {rendering innocuous} or otherwise treating exhaust gases F01N3/00)
B01D53/92 (Of engine exhaust gases) appears on 7,296 US grants and 7,642 published applications in this corpus.
Search patents in B01D- Granted patents
- 7,296
- Published applications
- 7,642
- Assignees
- 1,543
- Inventors
- 11,061
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 57 | 0 |
| 1977 | 43 | 0 |
| 1978 | 48 | 0 |
| 1979 | 26 | 0 |
| 1980 | 34 | 0 |
| 1981 | 22 | 0 |
| 1982 | 9 | 0 |
| 1983 | 24 | 0 |
| 1984 | 18 | 0 |
| 1985 | 22 | 0 |
| 1986 | 13 | 0 |
| 1987 | 17 | 0 |
| 1988 | 25 | 0 |
| 1989 | 27 | 0 |
| 1990 | 42 | 0 |
| 1991 | 56 | 0 |
| 1992 | 66 | 0 |
| 1993 | 71 | 0 |
| 1994 | 76 | 0 |
| 1995 | 81 | 0 |
| 1996 | 85 | 0 |
| 1997 | 75 | 0 |
| 1998 | 143 | 0 |
| 1999 | 153 | 0 |
| 2000 | 158 | 0 |
| 2001 | 159 | 79 |
| 2002 | 146 | 161 |
| 2003 | 153 | 220 |
| 2004 | 149 | 266 |
| 2005 | 137 | 204 |
| 2006 | 123 | 235 |
| 2007 | 121 | 262 |
| 2008 | 111 | 239 |
| 2009 | 160 | 393 |
| 2010 | 233 | 360 |
| 2011 | 211 | 294 |
| 2012 | 242 | 261 |
| 2013 | 276 | 300 |
| 2014 | 265 | 385 |
| 2015 | 305 | 444 |
| 2016 | 326 | 369 |
| 2017 | 352 | 447 |
| 2018 | 324 | 460 |
| 2019 | 416 | 414 |
| 2020 | 360 | 388 |
| 2021 | 338 | 317 |
| 2022 | 286 | 343 |
| 2023 | 252 | 282 |
| 2024 | 190 | 234 |
| 2025 | 178 | 148 |
| 2026 | 92 | 137 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Exhaust gas purification catalyst6 Oct 2026US 12,752,237 B2Cataler Corporation
- Multi-layer TWC formulations with optimalized PGM loadings29 Sep 2026US 12,746,510 B2Johnson Matthey Public Limited Company
- Layered tri-metallic catalytic article and method of manufacturing the catalytic article29 Sep 2026US 12,746,532 B2BASF Mobile Emissions Catalysts LLC
- Exhaust gas purification device and method for manufacturing exhaust gas purification device29 Sep 2026US 12,746,533 B2Cataler Corporation
- Method for manufacturing exhaust gas purification catalyst29 Sep 2026US 12,746,538 B2Cataler Corporation
- Exhaust purification device8 Oct 2026US 2026/0307009 A1Mazda Motor Corporation
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Method for producing fe-doped beta zeolite catalyst monoliths8 Oct 2026US 2026/0307064 A1BASF SE
- Catalytic article comprising vanadium-containing catalyst and oxidation catalyst8 Oct 2026US 2026/0307065 A1
- Method for removing moisture at high efficiency by membrane-based carbon dioxide capture system and apparatus therefor1 Oct 2026US 2026/0295516 A1Hyundai Motor Company
Most cited
By later US patents
- Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts223US 4,961,917 AEngelhard Corporation · 1990
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Exhaust purification device of internal combustion engine199US 5,473,887 AToyota Jidosha Kabushiki Kaisha · 1995
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999
- Apparatus and method for internal combustion engine control173US 5,657,625 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1997