B01D 53/34
Chemical or biological purification of waste gases
B01D53/34 (Chemical or biological purification of waste gases) appears on 19,788 US grants and 19,200 published applications in this corpus.
Search patents in B01D- Granted patents
- 19,788
- Published applications
- 19,200
- Assignees
- 6,208
- Inventors
- 35,699
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 262 | 0 |
| 1977 | 239 | 0 |
| 1978 | 220 | 0 |
| 1979 | 154 | 0 |
| 1980 | 194 | 0 |
| 1981 | 186 | 0 |
| 1982 | 136 | 0 |
| 1983 | 147 | 0 |
| 1984 | 140 | 0 |
| 1985 | 151 | 0 |
| 1986 | 143 | 0 |
| 1987 | 144 | 0 |
| 1988 | 184 | 0 |
| 1989 | 235 | 0 |
| 1990 | 240 | 0 |
| 1991 | 236 | 0 |
| 1992 | 289 | 0 |
| 1993 | 302 | 0 |
| 1994 | 277 | 0 |
| 1995 | 276 | 0 |
| 1996 | 303 | 0 |
| 1997 | 306 | 0 |
| 1998 | 372 | 0 |
| 1999 | 353 | 0 |
| 2000 | 390 | 0 |
| 2001 | 394 | 156 |
| 2002 | 335 | 396 |
| 2003 | 394 | 506 |
| 2004 | 317 | 618 |
| 2005 | 299 | 493 |
| 2006 | 270 | 527 |
| 2007 | 272 | 536 |
| 2008 | 284 | 565 |
| 2009 | 356 | 777 |
| 2010 | 538 | 860 |
| 2011 | 474 | 848 |
| 2012 | 547 | 755 |
| 2013 | 689 | 839 |
| 2014 | 693 | 938 |
| 2015 | 724 | 968 |
| 2016 | 706 | 808 |
| 2017 | 736 | 918 |
| 2018 | 713 | 1000 |
| 2019 | 859 | 931 |
| 2020 | 803 | 882 |
| 2021 | 735 | 819 |
| 2022 | 676 | 856 |
| 2023 | 624 | 889 |
| 2024 | 557 | 857 |
| 2025 | 551 | 821 |
| 2026 | 363 | 637 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 53/74General processes for purification of waste gases8,333
- B01D 53/46Removing components of defined structure7,944
- B01D 53/92Of engine exhaust gases7,296
- B01D 53/96Regeneration, reactivation or recycling of reactants834
- B01D 53/38Removing components of undefined structure431
- B01D 53/346Controlling the process364
- B01D 53/73After-treatment of removed components249
- B01D 53/343Heat recovery232
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
- Exhaust gas purification catalyst6 Oct 2026US 12,752,237 B2Cataler 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
- 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.
- Abatement of effluent containing ammonium chloride8 Oct 2026US 2026/0307006 A1APPLIED Materials.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
Most cited
By later US patents
- Chemical vapor deposition hot-trap for unreacted precursor conversion and effluent removal440US 6,099,649 AAPPLIED Materials.Inc. · 2000
- Method for unreacted precursor conversion and effluent removal417US 6,402,806 B1APPLIED Materials.Inc. · 2002
- Thermal decomposition trap406US 5,114,683 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1992
- Abatement of effluent from chemical vapor deposition processes using ligand exchange resistant metal-organic precursor solutions401US 6,500,487 B1Advanced Technology Materials, Inc. · 2002
- Apparatus and method for controlled combustion of gaseous pollutants388US 7,569,193 B2APPLIED Materials.Inc. · 2009