Control device for exhaust system
US-2021332734-A1 · Oct 28, 2021 · US
Sulfur or sulfur oxides
Sulfur or sulfur oxides · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F01N3/085 |
| Official title | {Sulfur or sulfur oxides} |
| Display label | Sulfur or sulfur oxides |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 16 |
| 2016 | 9 |
| 2017 | 11 |
| 2018 | 7 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 4 |
| 2023 | 9 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Scrubber for exhaust gas cleaning
US-11008911-B1 · May 18, 2021 · US
Ship desulfurization device and ship equipped with ship desulfurization device
US-2020406185-A1 · Dec 31, 2020 · US
Preparation of exhaust gas from a gas turbine for exhaust gas recirculation
US-10865710-B2 · Dec 15, 2020 · US
Exhaust gas aftertreatment system for diesel engine and method of detecting abnormal injection
US-10851695-B2 · Dec 1, 2020 · US
Exhaust gas treatment apparatus
US-10767540-B2 · Sep 8, 2020 · US
Pollutant reduction device and method
US-10618622-B2 · Apr 14, 2020 · US
Oxidation catalyst for treating a natural gas emission
US-10525412-B2 · Jan 7, 2020 · US
NOx SENSOR CONTROL DEVICE AND NOx SENSOR CONTROL METHOD
US-2019376425-A1 · Dec 12, 2019 · US
Engine control apparatus
US-10494975-B2 · Dec 3, 2019 · US
Exhaust gas aftertreatment system for diesel engine and method of detecting abnormal injection
US-2019316504-A1 · Oct 17, 2019 · US
Controller for internal combustion engine
US-10378403-B2 · Aug 13, 2019 · US
Control apparatus and control method for internal combustion engine
US-2019203622-A1 · Jul 4, 2019 · US
Control apparatus for internal combustion engine suppressing white smoke emissions
US-10302029-B2 · May 28, 2019 · US
Engine control apparatus
US-2019107028-A1 · Apr 11, 2019 · US
Integrated system for seawater scrubbing of marine exhaust gas
US-2019099706-A1 · Apr 4, 2019 · US
System and methods for reducing SOx gases in aftertreatment systems
US-10247070-B2 · Apr 2, 2019 · US
An exhaust gas treatment apparatus
US-2018306085-A1 · Oct 25, 2018 · US
Controller for internal combustion engine
US-2018266291-A1 · Sep 20, 2018 · US
Deterioration diagnosis apparatus for selective catalytic reduction catalyst
US-10072553-B2 · Sep 11, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/085?
- CPC F01N3/085 is the Cooperative Patent Classification code for “Sulfur or sulfur oxides.”
- How many patents are filed under CPC F01N3/085 (Sulfur or sulfur oxides)?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/085 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).