F01N 2550/05
Systems for adding substances into exhaust
F01N2550/05 (Systems for adding substances into exhaust) appears on 371 US grants and 423 published applications in this corpus.
Search patents in F01N- Granted patents
- 371
- Published applications
- 423
- Assignees
- 106
- Inventors
- 825
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 0 |
| 2003 | 1 | 3 |
| 2004 | 0 | 3 |
| 2005 | 3 | 4 |
| 2006 | 3 | 7 |
| 2007 | 3 | 12 |
| 2008 | 2 | 14 |
| 2009 | 5 | 28 |
| 2010 | 12 | 33 |
| 2011 | 17 | 23 |
| 2012 | 30 | 20 |
| 2013 | 24 | 33 |
| 2014 | 21 | 25 |
| 2015 | 37 | 44 |
| 2016 | 31 | 33 |
| 2017 | 41 | 33 |
| 2018 | 22 | 28 |
| 2019 | 31 | 23 |
| 2020 | 19 | 13 |
| 2021 | 17 | 12 |
| 2022 | 12 | 6 |
| 2023 | 8 | 14 |
| 2024 | 15 | 7 |
| 2025 | 7 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reducing agent supply device, method for controlling reducing agent supply device, and control device14 Jul 2026US 12,680,487 B2Komatsu Ltd.
- Exhaust gas purification control device7 Oct 2025US 12,435,652 B2Denso Corporation
- Additive for cleaning SCR systems5 Aug 2025US 12,378,505 B2Tunap GmbH & Co. KG
- NOx sensor diagnostics in heavy-duty motor vehicle engines15 Jul 2025US 12,359,598 B2PACCAR Inc
- Pressure control in an exhaust aftertreatment system24 Jun 2025US 12,338,760 B2Robert Bosch GmbH
- Ultra-low nox diesel engine generator with selective catalytic reduction engineered exhaust system and method1 Oct 2026US 2026/0298124 A1Industrial Service Solutions WC, Inc.
- Reducing agent supply device, method for controlling reducing agent supply device, and control device13 Nov 2025US 2025/0347241 A1Komatsu Ltd.
- Method for predicting remaining service life of urea pump and related apparatus21 Aug 2025US 2025/0265552 A1Weichai Power Co., Ltd.
- Pressure control in an exhaust aftertreatment system15 May 2025US 2025/0154889 A1Robert Bosch GmbH
- Method and apparatus for monitoring a thermal degradation of a reducing solution20 Feb 2025US 2025/0061754 A1Errecinque S.R.L.
Most cited
By later US patents
- Reducing no.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction171US 6,063,350 AClean Diesel Technologies, Inc. · 2000
- Exhaust gas purification system for an internal combustion engine133US 5,201,802 AToyota Jidosha Kabushiki Kaisha · 1993
- Diagnostic system for an emissions control on an engine75US 6,266,955 B1Caterpillar Inc. · 2001
- Method and device for exhaust gas after-treatment in an internal combustion engine equipped with an SCR catalyst74US 6,209,315 B1Siemens Akteingesellschaft · 2001
- Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance59US 6,546,720 B2Ford Global Technologies, LLC · 2003