B01D 53/94
By catalytic processes
Official title: by catalytic processes
B01D53/94 (By catalytic processes) appears on 7,010 US grants and 7,300 published applications in this corpus.
Search patents in B01D- Granted patents
- 7,010
- Published applications
- 7,300
- Assignees
- 1,428
- Inventors
- 10,459
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 55 | 0 |
| 1977 | 42 | 0 |
| 1978 | 48 | 0 |
| 1979 | 26 | 0 |
| 1980 | 33 | 0 |
| 1981 | 20 | 0 |
| 1982 | 8 | 0 |
| 1983 | 23 | 0 |
| 1984 | 18 | 0 |
| 1985 | 22 | 0 |
| 1986 | 13 | 0 |
| 1987 | 17 | 0 |
| 1988 | 25 | 0 |
| 1989 | 27 | 0 |
| 1990 | 42 | 0 |
| 1991 | 54 | 0 |
| 1992 | 66 | 0 |
| 1993 | 69 | 0 |
| 1994 | 73 | 0 |
| 1995 | 78 | 0 |
| 1996 | 80 | 0 |
| 1997 | 69 | 0 |
| 1998 | 137 | 0 |
| 1999 | 150 | 0 |
| 2000 | 158 | 0 |
| 2001 | 152 | 78 |
| 2002 | 141 | 154 |
| 2003 | 148 | 212 |
| 2004 | 141 | 250 |
| 2005 | 127 | 198 |
| 2006 | 117 | 216 |
| 2007 | 111 | 256 |
| 2008 | 109 | 234 |
| 2009 | 152 | 376 |
| 2010 | 228 | 347 |
| 2011 | 205 | 287 |
| 2012 | 238 | 252 |
| 2013 | 266 | 281 |
| 2014 | 259 | 362 |
| 2015 | 288 | 416 |
| 2016 | 305 | 353 |
| 2017 | 329 | 426 |
| 2018 | 313 | 446 |
| 2019 | 401 | 402 |
| 2020 | 346 | 377 |
| 2021 | 326 | 300 |
| 2022 | 275 | 323 |
| 2023 | 247 | 270 |
| 2024 | 184 | 221 |
| 2025 | 164 | 141 |
| 2026 | 85 | 122 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 53/9404Removing only nitrogen compounds3,377
- B01D 53/9445Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way2,401
- B01D 53/9495Controlling the catalytic process1,327
- B01D 53/944Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts1,289
- B01D 53/9459Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by1,259
- B01D 53/9481Catalyst preceded by an adsorption device without catalytic function for temporary storage371
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
- Honeycomb structure and honeycomb filter1 Oct 2026US 2026/0295525 A1NGK Insulators, Ltd.
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