Method for regulating the platinum oxide fraction in a fuel cell, and fuel cell system for a motor vehicle
US-12469867-B2 · Nov 11, 2025 · US
Concentration; Density (H01M8/04828 takes precedence)
Concentration; Density (H01M8/04828 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04791 |
| Official title | Concentration; Density (H01M8/04828 takes precedence) |
| Display label | Concentration; Density (H01M8/04828 takes precedence) |
| Total patents | 37 |
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 | 3 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 1 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Inerting system for an aircraft
US-2025229910-A1 · Jul 17, 2025 · US
Electrochemical cell deionization system
US-2025003094-A1 · Jan 2, 2025 · US
Gas detection system and gas detection method
US-2024377035-A1 · Nov 14, 2024 · US
Desalination device
US-2024294408-A1 · Sep 5, 2024 · US
Method for regulating the platinum oxide fraction in a fuel cell, and fuel cell system for a motor vehicle
US-2024243316-A1 · Jul 18, 2024 · US
Apparatus and method for determining state of charge in a redox flow battery via limiting currents
US-2024113313-A1 · Apr 4, 2024 · US
Apparatus and method for determining state of charge in a redox flow battery via limiting currents
US-11929528-B2 · Mar 12, 2024 · US
Fuel cell system
US-11367885-B2 · Jun 21, 2022 · US
Fuel cell system
US-2021359316-A1 · Nov 18, 2021 · US
Fuel cell system
US-11094949-B2 · Aug 17, 2021 · US
Aging method of fuel cell
US-11081714-B2 · Aug 3, 2021 · US
Fuel cell system having oxygen sensor, and control method thereof
US-11011766-B2 · May 18, 2021 · US
Desalination device
US-2020399149-A1 · Dec 24, 2020 · US
Apparatus and method for determining state of charge in a redox flow battery via limiting currents
US-2020381751-A1 · Dec 3, 2020 · US
Method for determining a content of a gas component in a gas mixture conveyed in a recirculating manner via a fuel cell
US-10847817-B2 · Nov 24, 2020 · US
Apparatus and method for determining state of charge in a redox flow battery via limiting currents
US-10833340-B2 · Nov 10, 2020 · US
Method of starting-up a fuel cell arrangement and fuel cell arrangement
US-10727510-B2 · Jul 28, 2020 · US
Fuel cell system
US-2020203739-A1 · Jun 25, 2020 · US
Aging method of fuel cell
US-2020099071-A1 · Mar 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04791?
- CPC H01M8/04791 is the Cooperative Patent Classification code for “Concentration; Density (H01M8/04828 takes precedence).”
- How many patents are filed under CPC H01M8/04791 (Concentration; Density (H01M8/04828 takes precedence))?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04791 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).