B01D 53/9422
For removing nitrogen oxides by nox storage or reduction by cyclic switching
Official title: {for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases (LNT, NSC, NSR)}
B01D53/9422 (For removing nitrogen oxides by nox storage or reduction by cyclic switching) appears on 463 US grants and 538 published applications in this corpus.
Search patents in B01D- Granted patents
- 463
- Published applications
- 538
- Assignees
- 144
- Inventors
- 1,043
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 8 | 8 |
| 2002 | 19 | 27 |
| 2003 | 15 | 22 |
| 2004 | 14 | 10 |
| 2005 | 12 | 13 |
| 2006 | 10 | 20 |
| 2007 | 8 | 16 |
| 2008 | 3 | 10 |
| 2009 | 7 | 23 |
| 2010 | 19 | 29 |
| 2011 | 7 | 23 |
| 2012 | 20 | 25 |
| 2013 | 23 | 33 |
| 2014 | 22 | 16 |
| 2015 | 28 | 21 |
| 2016 | 16 | 17 |
| 2017 | 24 | 36 |
| 2018 | 23 | 53 |
| 2019 | 35 | 30 |
| 2020 | 23 | 30 |
| 2021 | 23 | 17 |
| 2022 | 25 | 21 |
| 2023 | 10 | 12 |
| 2024 | 13 | 17 |
| 2025 | 21 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cerium- and zirconium-based mixed oxides24 Mar 2026US 12,582,966 B2Rhodia Operations
- Systems and methods for predicting and controlling tailpipe NOx conversion and ammonia slip based on degradation of an aftertreatment system10 Feb 2026US 12,546,241 B2Cummins Inc.
- Catalyst for reducing ammonia emissions30 Dec 2025US 12,508,576 B2Umicore AG & Co. KG
- Catalyst composition comprising magnetic material adapted for inductive heating30 Dec 2025US 12,508,578 B2BASF Mobile Emissions Catalysts LLC
- Method for preparing an alumina supported perovskite type oxide composition, alumina supported perovskite type oxide composition and its use9 Dec 2025US 12,491,472 B2
- System and method for treatment of an exhaust stream and control system therefor23 Jul 2026US 2026/0210279 A1Scania CV AB
- Systems and methods for predicting and controlling tailpipe nox conversion and ammonia slip based on degradation of an aftertreatment system30 Apr 2026US 2026/0117687 A1Cummins Inc.
- Catalyst for Exhaust Gas Purification9 Apr 2026US 2026/0097363 A1Cataler Corporation
- Exhaust gas purification device25 Dec 2025US 2025/0387783 A1Cataler Corporation
- Exhaust treatment method and apparatus having particulate filters and scr24 Jul 2025US 2025/0237161 A1Corning Incorporated
Most cited
By later US patents
- Exhaust purification device of internal combustion engine199US 5,473,887 AToyota Jidosha Kabushiki Kaisha · 1995
- Low emission, diesel-cycle engine158US 6,470,682 B2The United States of America as represented by the Administrator of the United States Environmental Protection Agency · 2002
- Exhaust gas purification apparatus for an internal combustion engine149US 5,402,641 AToyota Jidosha Kabushiki Kaisha · 1995
- Low emission, diesel-cycle engine146US 6,301,888 B1The United States of America as represented by the Administrator of the Environmental Protection Agency · 2001
- Exhaust gas purification device for an engine103US 5,472,673 AToyota Jidosha Kabushiki Kaisha · 1995