B01D 2255/00
Catalysts
B01D2255/00 (Catalysts) appears on 5,634 US grants and 7,416 published applications in this corpus.
Search patents in B01D- Granted patents
- 5,634
- Published applications
- 7,416
- Assignees
- 1,984
- Inventors
- 11,431
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 17 | 0 |
| 1978 | 17 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 12 | 0 |
| 1991 | 11 | 0 |
| 1992 | 21 | 0 |
| 1993 | 19 | 0 |
| 1994 | 18 | 0 |
| 1995 | 21 | 0 |
| 1996 | 31 | 0 |
| 1997 | 38 | 0 |
| 1998 | 58 | 0 |
| 1999 | 67 | 0 |
| 2000 | 85 | 0 |
| 2001 | 55 | 32 |
| 2002 | 62 | 64 |
| 2003 | 59 | 84 |
| 2004 | 63 | 102 |
| 2005 | 45 | 127 |
| 2006 | 47 | 149 |
| 2007 | 52 | 189 |
| 2008 | 73 | 192 |
| 2009 | 85 | 373 |
| 2010 | 203 | 404 |
| 2011 | 182 | 359 |
| 2012 | 241 | 331 |
| 2013 | 296 | 314 |
| 2014 | 279 | 377 |
| 2015 | 292 | 411 |
| 2016 | 302 | 376 |
| 2017 | 322 | 425 |
| 2018 | 321 | 456 |
| 2019 | 378 | 402 |
| 2020 | 321 | 411 |
| 2021 | 314 | 375 |
| 2022 | 296 | 385 |
| 2023 | 306 | 375 |
| 2024 | 214 | 313 |
| 2025 | 221 | 221 |
| 2026 | 136 | 169 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2255/20Metals or compounds thereofIndexing code3,963
- B01D 2255/90Physical characteristics of catalystsIndexing code2,653
- B01D 2255/10Noble metals or compounds thereofIndexing code2,569
- B01D 2255/50ZeolitesIndexing code1,300
- B01D 2255/40Mixed oxidesIndexing code880
- B01D 2255/80Type of catalytic reactionIndexing code604
- B01D 2255/30SilicaIndexing code332
- B01D 2255/70Non-metallic catalysts, additives or dopantsIndexing code211
All 9 subgroupsShow fewer
Recent patents
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- Exhaust gas purification catalyst6 Oct 2026US 12,752,237 B2Cataler Corporation
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Photocatalytic air treatment29 Sep 2026US 12,746,509 B2Dyson Technology Limited
- Multi-layer TWC formulations with optimalized PGM loadings29 Sep 2026US 12,746,510 B2Johnson Matthey Public Limited Company
- 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
- Catalytic article comprising vanadium-containing catalyst and oxidation catalyst8 Oct 2026US 2026/0307065 A1
- Improved electrodes for electrochemically driven carbon dioxide separator1 Oct 2026US 2026/0295518 A1Repair DAC Ltd.
- Complete oxidation catalysts for dilute alkanes1 Oct 2026US 2026/0295521 A1Icarus Technology LLC
Most cited
By later US patents
- Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts223US 4,961,917 AEngelhard Corporation · 1990
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999
- System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber systems182US 7,722,843 B12010
- Layered catalyst composite162US 5,597,771 AEngelhard Corporation · 1997
- Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same156US 5,516,497 AEngelhard Corporation · 1996