Method for stopping fuel cell system and fuel cell system
US-2015380753-A1 · Dec 31, 2015 · US
during shut-down
during shut-down · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04228 |
| Official title | during shut-down |
| Display label | during shut-down |
| Total patents | 574 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 64 |
| 2016 | 54 |
| 2017 | 54 |
| 2018 | 51 |
| 2019 | 53 |
| 2020 | 57 |
| 2021 | 40 |
| 2022 | 48 |
| 2023 | 69 |
| 2024 | 37 |
| 2025 | 38 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fuel Cell Supply System
US-2015380752-A1 · Dec 31, 2015 · US
Sealing apparatus for a fuel cell stack
US-2015372327-A1 · Dec 24, 2015 · US
Fuel cell system and operation method thereof which ensures the system will perform normal operation after operating in a special operation mode
US-9219284-B2 · Dec 22, 2015 · US
Solid oxide fuel cell device
US-9214690-B2 · Dec 15, 2015 · US
Fuel cell system
US-9214688-B2 · Dec 15, 2015 · US
Power-on shutdown of fuel cell power plant for enhanced durability
US-2015357663-A1 · Dec 10, 2015 · US
Solid oxide fuel cell device
US-9209469-B2 · Dec 8, 2015 · US
Fuel cell system and power generation performance recovery method of a fuel cell in a fuel cell system
US-2015333349-A1 · Nov 19, 2015 · US
Fuel cell system
US-9190679-B2 · Nov 17, 2015 · US
Fuel cell module
US-9190684-B2 · Nov 17, 2015 · US
Fuel cell with selectively conducting anode
US-2015325859-A1 · Nov 12, 2015 · US
Systems and methods for mitigating carbon corrosion in a fuel cell system
US-2015325872-A1 · Nov 12, 2015 · US
Fuel cell cathode balance of plant freeze strategy
US-2015311547-A1 · Oct 29, 2015 · US
Device for removing residual hydrogen in fuel cell
US-2015311544-A1 · Oct 29, 2015 · US
Electronic equipment provided with battery check device
US-9172105-B2 · Oct 27, 2015 · US
Power controlling apparatus
US-2015295293-A1 · Oct 15, 2015 · US
Fuel cell system, control method for the fuel cell system, and electric vehicle equipped with the fuel cell system
US-9160018-B2 · Oct 13, 2015 · US
Fast starting fuel cell
US-2015288041-A1 · Oct 8, 2015 · US
System and method for recovering output of fuel cell
US-2015270565-A1 · Sep 24, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04228?
- CPC H01M8/04228 is the Cooperative Patent Classification code for “during shut-down.”
- How many patents are filed under CPC H01M8/04228 (during shut-down)?
- Our database includes 574 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04228 growing?
- Publication counts under this code: 37 in 2024 vs 38 in 2025 (latest complete years).