Methods of cleaning gas sensors
US-10138794-B2 · Nov 27, 2018 · US
Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines · 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 | F02B77/04 |
| Official title | Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines |
| Display label | Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines |
| Total patents | 194 |
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 | 12 |
| 2016 | 8 |
| 2017 | 24 |
| 2018 | 29 |
| 2019 | 29 |
| 2020 | 25 |
| 2021 | 22 |
| 2022 | 21 |
| 2023 | 13 |
| 2024 | 10 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same
US-10113452-B2 · Oct 30, 2018 · US
Method for cleaning continuously variable valve timing system
US-2018298815-A1 · Oct 18, 2018 · US
Sensor failure diagnostic apparatus
US-2018275016-A1 · Sep 27, 2018 · US
Engine control apparatus
US-2018245536-A1 · Aug 30, 2018 · US
Wear-resistant coating for oil pump cavity
US-2018223835-A1 · Aug 9, 2018 · US
Unburned fuel venting in internal combustion engines
US-10041438-B2 · Aug 7, 2018 · US
Quaternary ammonium amide and/or ester salts
US-10023819-B2 · Jul 17, 2018 · US
Method for preventing piston oil-up and engine employing the same
US-9995215-B2 · Jun 12, 2018 · US
General purpose engine
US-9964065-B2 · May 8, 2018 · US
System for determining piston damage based on carbon deposit growth
US-9957887-B2 · May 1, 2018 · US
Cleaning of a charge-air cooler in a system with exhaust gas recirculation arrangement
US-9945331-B2 · Apr 17, 2018 · US
Methods of cleaning gas sensors
US-2018087433-A1 · Mar 29, 2018 · US
Method and system for engine control
US-9897020-B2 · Feb 20, 2018 · US
Removing material buildup from an internal surface within a gas turbine engine system
US-2018036776-A1 · Feb 8, 2018 · US
Composition for cleaning gasoline engine fuel delivery systems, air intake systems, and combustion chambers
US-2018002645-A1 · Jan 4, 2018 · US
Lubricating composition containing an oxyalkylated aromatic polyol compound
US-2017355924-A1 · Dec 14, 2017 · US
Method and system for engine control
US-2017356359-A1 · Dec 14, 2017 · US
Lubricating composition containing an oxyalkylated aromatic polyol compound
US-2017355923-A1 · Dec 14, 2017 · US
Carbon scraper
US-9822702-B2 · Nov 21, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B77/04?
- CPC F02B77/04 is the Cooperative Patent Classification code for “Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines.”
- How many patents are filed under CPC F02B77/04 (Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines)?
- Our database includes 194 publications tagged with this CPC code.
- Is patent activity under CPC F02B77/04 growing?
- Publication counts under this code: 10 in 2024 vs 1 in 2025 (latest complete years).