High-performance cathode catalyst for metal-air battery and preparation method thereof
US-2022352526-A1 · Nov 3, 2022 · US
Impregnation
Impregnation · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M4/8846 |
| Official title | {Impregnation} |
| Display label | Impregnation |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 7 |
| 2017 | 8 |
| 2018 | 14 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 9 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 8 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Metal-air battery and method of producing air electrode
US-11374229-B2 · Jun 28, 2022 · US
Anode for a solid oxide fuel cell and composition and method for forming same
US-11367888-B2 · Jun 21, 2022 · US
Direct hydrocarbon metal supported solid oxide fuel cell
US-11322766-B2 · May 3, 2022 · US
Fabrication processes for solid state electrochemical devices
US-11283084-B2 · Mar 22, 2022 · US
Direct hydrocarbon metal supported solid oxide fuel cell
US-2021376367-A1 · Dec 2, 2021 · US
Method for infiltrating with precursor solution using moisture control
US-11177482-B2 · Nov 16, 2021 · US
Electrode for membrane-electrode assembly and method of manufacturing same
US-2021336275-A1 · Oct 28, 2021 · US
Solid oxide fuel cell and manufacturing method of the same
US-2021288332-A1 · Sep 16, 2021 · US
Method for Preparing Connector-free Anode-supported Solid Oxide Fuel Cell Stack by Means of 3D Printing
US-2021249681-A1 · Aug 12, 2021 · US
Metal-Air Battery and Method of Producing Air Electrode
US-2021249664-A1 · Aug 12, 2021 · US
Secondary battery
US-10992002-B2 · Apr 27, 2021 · US
Solid oxide fuel cell and manufacturing method of the same
US-2021066725-A1 · Mar 4, 2021 · US
Electrochemical cells comprising three-dimensional (3d) electrodes including a 3d architectured material, related systems, methods for forming the 3d architectured material, and related methods of forming hydrogen
US-2021020958-A1 · Jan 21, 2021 · US
Membrane-electrode assembly for fuel cell, method for manufacturing same, and fuel cell system comprising same
US-10868311-B2 · Dec 15, 2020 · US
Method to Make Isostructural Bilayer Oxygen Electrode
US-2020365911-A1 · Nov 19, 2020 · US
Method for infiltrating with precursor solution using moisture control
US-2020335798-A1 · Oct 22, 2020 · US
Method of producing an electrode substrate made of carbon fibers
US-10629893-B2 · Apr 21, 2020 · US
An anode for a solid oxide fuel cell
US-2020075979-A1 · Mar 5, 2020 · US
Reinforced membrane, electrochemical cell and fuel cell comprising same, and production method for reinforced membrane
US-10476094-B2 · Nov 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M4/8846?
- CPC H01M4/8846 is the Cooperative Patent Classification code for “Impregnation.”
- How many patents are filed under CPC H01M4/8846 (Impregnation)?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC H01M4/8846 growing?
- Publication counts under this code: 8 in 2024 vs 7 in 2025 (latest complete years).