Device for diagnosing valve failure of fuel cell system
US-2024347748-A1 · Oct 17, 2024 · US
by purging or increasing flow or pressure of reactants
by purging or increasing flow or pressure of reactants · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04179 |
| Official title | {by purging or increasing flow or pressure of reactants} |
| Display label | by purging or increasing flow or pressure of reactants |
| Total patents | 460 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 27 |
| 2016 | 39 |
| 2017 | 32 |
| 2018 | 39 |
| 2019 | 35 |
| 2020 | 53 |
| 2021 | 53 |
| 2022 | 50 |
| 2023 | 49 |
| 2024 | 35 |
| 2025 | 39 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for supplying a fuel cell having alternate supply and purge phases
US-2016380291-A1 · Dec 29, 2016 · US
Fuel cell system
US-2016380283-A1 · Dec 29, 2016 · US
Fuel cell system
US-2016380282-A1 · Dec 29, 2016 · US
Multimode charging device and method
US-2016322832-A1 · Nov 3, 2016 · US
Multiple injection fuel cell and operating method thereof
US-2016308227-A1 · Oct 20, 2016 · US
Fuel cell system and humidification device of the same
US-9466846-B2 · Oct 11, 2016 · US
Method for preparing to start a fuel cell system
US-2016276683-A1 · Sep 22, 2016 · US
Fuel cell humidification device and fuel cell motorcycle
US-2016276682-A1 · Sep 22, 2016 · US
Fuel cell purge line system
US-2016268614-A1 · Sep 15, 2016 · US
Anode bleed control in a fuel cell stack
US-2016240875-A1 · Aug 18, 2016 · US
Fuel cell system and the operating method thereof
US-9413027-B2 · Aug 9, 2016 · US
Piping member for fuel cell and fuel cell vehicle equipped therewith
US-2016221433-A1 · Aug 4, 2016 · US
Pulsating operation method and system for fuel cell system
US-9391333-B2 · Jul 12, 2016 · US
Fuel cell system and control method of fuel cell system
US-2016156046-A1 · Jun 2, 2016 · US
Fuel cell system and method of controlling fuel cell system
US-2016149242-A1 · May 26, 2016 · US
Fuel cell system and method for discharging fluid in the system
US-2016141672-A1 · May 19, 2016 · US
Fuel cell system and control method therefor
US-2016141656-A1 · May 19, 2016 · US
Water drainage device for fuel cell, fuel cell system, moving body and control method of fuel cell system
US-2016141671-A1 · May 19, 2016 · US
Fuel cell system and control method of the same
US-2016141670-A1 · May 19, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04179?
- CPC H01M8/04179 is the Cooperative Patent Classification code for “by purging or increasing flow or pressure of reactants.”
- How many patents are filed under CPC H01M8/04179 (by purging or increasing flow or pressure of reactants)?
- Our database includes 460 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04179 growing?
- Publication counts under this code: 35 in 2024 vs 39 in 2025 (latest complete years).