Light-driven fuel cell, cathode catalyst for same, anode catalyst for same, and methanol production method comprising converting methane into methanol
US-12473657-B2 · Nov 18, 2025 · US
Photoelectrolysis
Photoelectrolysis · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C25B3/21 |
| Official title | Photoelectrolysis |
| Display label | Photoelectrolysis |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reduction Electrode and Manufacturing Method of Reduction Electrode
US-2025333861-A1 · Oct 30, 2025 · US
Photovoltaic-electrochemical (PV-EC) system
US-12442095-B2 · Oct 14, 2025 · US
Carbon dioxide gas-phase reduction device and carbon dioxide gas-phase reduction method
US-12305301-B2 · May 20, 2025 · US
Electrolyte Membrane
US-2025027220-A1 · Jan 23, 2025 · US
Photochemical diodes for unassisted biomass valorization coupled with hydrogen production or carbon dioxide fixation
US-2024410064-A1 · Dec 12, 2024 · US
Carbon Dioxide Reduction Device
US-2024328003-A1 · Oct 3, 2024 · US
CO2 reduction toward methane
US-11993857-B2 · May 28, 2024 · US
Carbon Dioxide Gas-Phase Reduction Device And Carbon Dioxide Gas-Phase Reduction Method
US-2024124996-A1 · Apr 18, 2024 · US
Integrated photo-electrochemical device for concentrated irradiation
US-11781230-B2 · Oct 10, 2023 · US
Nanostructured electrodes and methods of making and use thereof
US-2023295814-A1 · Sep 21, 2023 · US
Selection of a heterogeneous catalysts with metallic surface states
US-2023226536-A1 · Jul 20, 2023 · US
Light-driven fuel cell, cathode catalyst for same, anode catalyst for same, and methanol production method comprising converting methane into methanol
US-2023193489-A1 · Jun 22, 2023 · US
Carbon Dioxide Gas Phase Reduction Device and Carbon Dioxide Gas Phase Reduction Method
US-2023135736-A1 · May 4, 2023 · US
Co2 reduction toward methane
US-2023094781-A1 · Mar 30, 2023 · US
Co2 conversion with metal sulfide nanoparticles
US-2023017032-A1 · Jan 19, 2023 · US
CO2 reduction toward methane
US-11512399-B2 · Nov 29, 2022 · US
Electrochemical and photoelectrochemical reduction of furfurals
US-11427918-B2 · Aug 30, 2022 · US
Co2 conversion with nanowire-nanoparticle architecture
US-2022243341-A1 · Aug 4, 2022 · US
Porous nanoparticle catalyst for methane conversion and method of preparing the same
US-2022228278-A1 · Jul 21, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25B3/21?
- CPC C25B3/21 is the Cooperative Patent Classification code for “Photoelectrolysis.”
- How many patents are filed under CPC C25B3/21 (Photoelectrolysis)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC C25B3/21 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).