F01N 2900/1818
Concentration of the reducing agent
F01N2900/1818 (Concentration of the reducing agent) appears on 143 US grants and 171 published applications in this corpus.
Search patents in F01N- Granted patents
- 143
- Published applications
- 171
- Assignees
- 84
- Inventors
- 383
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 10 |
| 2008 | 3 | 6 |
| 2009 | 3 | 2 |
| 2010 | 6 | 6 |
| 2011 | 4 | 5 |
| 2012 | 4 | 7 |
| 2013 | 7 | 13 |
| 2014 | 5 | 12 |
| 2015 | 12 | 17 |
| 2016 | 11 | 14 |
| 2017 | 12 | 7 |
| 2018 | 8 | 18 |
| 2019 | 12 | 14 |
| 2020 | 19 | 12 |
| 2021 | 9 | 7 |
| 2022 | 14 | 9 |
| 2023 | 4 | 5 |
| 2024 | 4 | 1 |
| 2025 | 4 | 1 |
| 2026 | 0 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Onboard device and method for checking diesel exhaust fluid quality11 Nov 2025US 12,467,395 B2Perkins Engines Company Limited
- Exhaust fluid filter including hydrocarbon detection witness media12 Aug 2025US 12,385,423 B2Cummins Emission Solutions Inc.
- Systems and methods for measuring exhaust gas species and SCR catalyst NOx storage for SCR-related controls and diagnostics8 Jul 2025US 12,352,197 B2Cummins Inc.
- Nozzle lance, combustion plant and method for exhaust gas treatment1 Apr 2025US 12,263,499 B2Rs Rittel GmbH
- Method and processor unit for operating an exhaust gas burner21 May 2024US 11,988,128 B2Robert Bosch GmbH
- Method for operating a drive device and corresponding drive device16 Jul 2026US 2026/0199835 A1Audi AG
- Systems and methods for measuring exhaust gas species and catalyst nox storage for catalyst-related controls and diagnostics25 Sep 2025US 2025/0297564 A1Cummins Inc.
- Systems and methods for measuring exhaust gas species and scr catalyst nox storage for scr-related controls and diagnostics7 Mar 2024US 2024/0077009 A1Cummins Inc.
- Detecting sensor malfunction or tampering based on reductant consumption5 Oct 2023US 2023/0311808 A1Caterpillar Inc.
- Exhaust Fluid Filter Including Hydrocarbon Detection Witness Media11 May 2023US 2023/0146166 A1Cummins Emission Solutions Inc.
Most cited
By later US patents
- Method and device for the catalytic reduction of nitrogen oxides contained in the off-gas from a combustion system33US 6,442,932 B1Siemens Aktiengesellschaft · 2002
- Device for treatment of exhaust of an internal combustion engine18US 7,449,162 B2Robert Bosch GmbH · 2008
- Method and device for reducing the nitrogen oxides in the exhaust gas of a combustion system17US 6,408,619 B1Siemens Aktiengesellschaft · 2002
- Multi-stage SCR control and diagnostic system17US 9,890,678 B22018
- Methods for an exhaust fluid sensor16US 8,505,371 B2Ford Global Technologies, LLC · 2013