F01N 2550/02
Catalytic activity of catalytic converters
F01N2550/02 (Catalytic activity of catalytic converters) appears on 1,174 US grants and 909 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,174
- Published applications
- 909
- Assignees
- 210
- Inventors
- 1,998
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 14 | 0 |
| 1993 | 28 | 0 |
| 1994 | 36 | 0 |
| 1995 | 43 | 0 |
| 1996 | 25 | 0 |
| 1997 | 29 | 0 |
| 1998 | 56 | 0 |
| 1999 | 53 | 0 |
| 2000 | 31 | 0 |
| 2001 | 24 | 8 |
| 2002 | 29 | 31 |
| 2003 | 38 | 36 |
| 2004 | 28 | 33 |
| 2005 | 26 | 23 |
| 2006 | 24 | 15 |
| 2007 | 15 | 24 |
| 2008 | 7 | 21 |
| 2009 | 15 | 31 |
| 2010 | 17 | 24 |
| 2011 | 14 | 31 |
| 2012 | 37 | 41 |
| 2013 | 24 | 36 |
| 2014 | 43 | 45 |
| 2015 | 44 | 65 |
| 2016 | 48 | 76 |
| 2017 | 63 | 54 |
| 2018 | 57 | 50 |
| 2019 | 60 | 58 |
| 2020 | 40 | 50 |
| 2021 | 45 | 35 |
| 2022 | 41 | 30 |
| 2023 | 32 | 33 |
| 2024 | 35 | 28 |
| 2025 | 25 | 18 |
| 2026 | 10 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Estimation method for determining the oxygen storage capacity of a catalytic converter22 Sep 2026US 12,742,408 B2Ferrari S.P. A.
- Systems and methods to assess state-of-health of an exhaust gas constituent capture device28 Jul 2026US 12,692,811 B2Cummins Inc.
- Systems and methods for detecting degradation of catalyst members of an aftertreatment system26 May 2026US 12,637,969 B2Cummins Emission Solutions Inc.
- Computer-implemented method for detecting a fault in a selective catalytic reducer assembly10 Mar 2026US 12,571,336 B2Volvo Truck Corporation
- Systems and methods for compensating NOx sensor measurements to meet sufficiency requirements10 Mar 2026US 12,571,337 B2Cummins Inc.
- Systems and methods for diesel oxidation catalyst aging prognostics and diagnosis27 Aug 2026US 2026/0249244 A1Cummins Inc.
- Exhaust purification device13 Aug 2026US 2026/0235058 A1Tokyo Roki Co., Ltd.
- Exhaust monitoring apparatus6 Aug 2026US 2026/0226858 A1Toyota Jidosha Kabushiki Kaisha
- Apparatus for diagnosing a post-processing system and a method thereof18 Jun 2026US 2026/0168424 A1AVL Software and Functions GmbH
- Engine catalyst diagnosis apparatus11 Jun 2026US 2026/0160194 A1Mazda Motor Corporation
Most cited
By later US patents
- Method for controlling the level of oxygen stored by a catalyst within a catalytic converter152US 5,842,340 AMotorola, Inc. · 1998
- Exhaust gas purification system for an internal combustion engine133US 5,201,802 AToyota Jidosha Kabushiki Kaisha · 1993
- Method and apparatus for monitoring and adjusting .lambda.-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines114US 4,622,809 ADaimler-Benz Aktiengesellschaft · 1986
- Method and apparatus for monitoring the activity of catalytic reactors112US 3,969,932 ARobert Bosch GmbH · 1976
- Catalyst monitor based on a thermal power model110US 5,626,014 AFord Motor Company · 1997