F01N 3/0807
By using absorbents or adsorbents
Official title: {by using absorbents or adsorbents}
F01N3/0807 (By using absorbents or adsorbents) appears on 3,219 US grants and 3,352 published applications in this corpus.
Search patents in F01N- Granted patents
- 3,219
- Published applications
- 3,352
- Assignees
- 569
- Inventors
- 4,827
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 9 | 0 |
| 1995 | 29 | 0 |
| 1996 | 28 | 0 |
| 1997 | 36 | 0 |
| 1998 | 55 | 0 |
| 1999 | 57 | 0 |
| 2000 | 58 | 0 |
| 2001 | 112 | 49 |
| 2002 | 120 | 137 |
| 2003 | 102 | 157 |
| 2004 | 139 | 173 |
| 2005 | 119 | 132 |
| 2006 | 117 | 156 |
| 2007 | 93 | 150 |
| 2008 | 72 | 199 |
| 2009 | 88 | 201 |
| 2010 | 126 | 169 |
| 2011 | 124 | 140 |
| 2012 | 153 | 102 |
| 2013 | 110 | 123 |
| 2014 | 126 | 106 |
| 2015 | 132 | 139 |
| 2016 | 102 | 141 |
| 2017 | 139 | 182 |
| 2018 | 132 | 192 |
| 2019 | 170 | 146 |
| 2020 | 131 | 154 |
| 2021 | 151 | 115 |
| 2022 | 116 | 94 |
| 2023 | 88 | 78 |
| 2024 | 73 | 58 |
| 2025 | 55 | 34 |
| 2026 | 24 | 25 |
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
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Portable carbon capture system15 Sep 2026US 12,736,002 B2Qatar University
- System and method for controlling a cold light off catalyst8 Sep 2026US 12,729,639 B2Fca US LLC
- Systems including a hydrogen internal combustion engine and aftertreatment system1 Sep 2026US 12,723,528 B2Cummins Emission Solutions Inc.
- Atmospheric steam desorption for direct air capture1 Oct 2026US 2026/0295505 A1Climeworks AG
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
- Systems, methods, and apparatuses for adsorbing carbon from engine exhaust gases1 Oct 2026US 2026/0298120 A1CO2 Filter, LLC
- Tractor24 Sep 2026US 2026/0286874 A1Kubota Corporation
- Aqueous composition having improved properties for the treatment of exhaust gases10 Sep 2026US 2026/0266209 A1Totalenergies Onetech
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- 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
- Method and apparatus for desulfating a no.sub.x trap176US 5,974,788 AFord Global Technologies, LLC · 1999