B01D 53/74
General processes for purification of waste gases
Official title: General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence)
B01D53/74 (General processes for purification of waste gases) appears on 8,333 US grants and 9,175 published applications in this corpus.
Search patents in B01D- Granted patents
- 8,333
- Published applications
- 9,175
- Assignees
- 3,926
- Inventors
- 20,025
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 56 | 0 |
| 1977 | 66 | 0 |
| 1978 | 59 | 0 |
| 1979 | 35 | 0 |
| 1980 | 43 | 0 |
| 1981 | 52 | 0 |
| 1982 | 35 | 0 |
| 1983 | 38 | 0 |
| 1984 | 37 | 0 |
| 1985 | 26 | 0 |
| 1986 | 35 | 0 |
| 1987 | 40 | 0 |
| 1988 | 70 | 0 |
| 1989 | 76 | 0 |
| 1990 | 88 | 0 |
| 1991 | 77 | 0 |
| 1992 | 110 | 0 |
| 1993 | 110 | 0 |
| 1994 | 102 | 0 |
| 1995 | 109 | 0 |
| 1996 | 136 | 0 |
| 1997 | 128 | 0 |
| 1998 | 159 | 0 |
| 1999 | 133 | 0 |
| 2000 | 168 | 0 |
| 2001 | 165 | 62 |
| 2002 | 131 | 171 |
| 2003 | 176 | 230 |
| 2004 | 133 | 283 |
| 2005 | 121 | 237 |
| 2006 | 107 | 210 |
| 2007 | 116 | 203 |
| 2008 | 138 | 243 |
| 2009 | 146 | 310 |
| 2010 | 246 | 402 |
| 2011 | 217 | 365 |
| 2012 | 227 | 315 |
| 2013 | 297 | 336 |
| 2014 | 283 | 378 |
| 2015 | 307 | 425 |
| 2016 | 252 | 370 |
| 2017 | 316 | 426 |
| 2018 | 329 | 456 |
| 2019 | 384 | 461 |
| 2020 | 381 | 452 |
| 2021 | 360 | 463 |
| 2022 | 350 | 445 |
| 2023 | 327 | 497 |
| 2024 | 304 | 491 |
| 2025 | 314 | 526 |
| 2026 | 218 | 418 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CO2 recovery system and CO2 recovery method6 Oct 2026US 12,752,235 B2Mitsubishi Heavy Industries, Ltd.
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- High throughput moving panel direct air capture system6 Oct 2026US 12,752,238 B2Zero Carbon Systems, Inc.
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Gas turbine engine fuel system8 Oct 2026US 2026/0306970 A1General Electric Company
- Absorbent for Capturing Carbon Dioxide8 Oct 2026US 2026/0307000 A1Panasia Co., Ltd.
- Amine compound, amine composition, carbon dioxide absorbent, method for recovering carbon dioxide, and carbon dioxide separation and recovery device8 Oct 2026US 2026/0307005 A1Mitsubishi Gas Chemical Company, Inc.
- Catalytic reactor and system for purification of carbon dioxide streams and methods of using the same8 Oct 2026US 2026/0307007 A1Oxy Low Carbon Ventures, LLC
- Air Treatment System8 Oct 2026US 2026/0307008 A1Universiteit Antwerpen
Most cited
By later US patents
- Apparatus for manufacturing a process abatement reactor386US 7,736,600 B2APPLIED Materials.Inc. · 2010
- Flow-stabilized wet scrubber system for treatment of process gases from semiconductor manufacturing operations320US 5,851,293 AATMI Ecosys Corporation · 1998
- Substoichiometric combustion of low heating value gases292US 4,363,361 AGulf Research & Development Company · 1982
- Method for removing pollutants from a combustor flue gas and system for same199US 5,505,766 AElectric Power Research, Inc. · 1996
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999