Stainless steel for fuel cell separators
US-9531014-B2 · Dec 27, 2016 · US
Alloys based on iron
Alloys based on iron · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/021 |
| Official title | Alloys based on iron |
| Display label | Alloys based on iron |
| Total patents | 422 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 28 |
| 2016 | 34 |
| 2017 | 33 |
| 2018 | 36 |
| 2019 | 46 |
| 2020 | 38 |
| 2021 | 46 |
| 2022 | 37 |
| 2023 | 41 |
| 2024 | 45 |
| 2025 | 30 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electrochemical reaction unit and fuel cell stack
US-2016372758-A1 · Dec 22, 2016 · US
Metallic plate with at least one measuring structure and method of producing a metallic plate with at least one measuring structure
US-2016351921-A1 · Dec 1, 2016 · US
Pre-formed powder delivery to powder press machine
US-9502721-B2 · Nov 22, 2016 · US
Fuel cell stack assembly and method of assembly
US-2016329586-A1 · Nov 10, 2016 · US
Fuel cell flow plate
US-2016329574-A1 · Nov 10, 2016 · US
Design of bipolar plates for use in conduction-cooled electrochemical cells
US-2016315333-A1 · Oct 27, 2016 · US
Molded part
US-9472816-B2 · Oct 18, 2016 · US
Separator for fuel cell and fuel cell stack
US-2016293974-A1 · Oct 6, 2016 · US
Single fuel cell and method of manufacturing single fuel cell
US-2016260993-A1 · Sep 8, 2016 · US
Method of manufacturing a fuel cell stack having an electrically conductive interconnect
US-9437880-B2 · Sep 6, 2016 · US
Oxidation process for interconnects and end plates
US-9437879-B1 · Sep 6, 2016 · US
Metallic separator for fuel cells and method of manufacturing the metallic separator
US-9431666-B2 · Aug 30, 2016 · US
Stainless separator for fuel cell and method of manufacturing the same
US-9425450-B2 · Aug 23, 2016 · US
Corrosion Resistant Metal Bipolar Plate for a PEMFC Including a Radical Scavenger
US-2016240865-A1 · Aug 18, 2016 · US
Stainless steel foil for separators of polymer electrolyte fuel cells
US-2016240866-A1 · Aug 18, 2016 · US
Interconnect
US-2016233524-A1 · Aug 11, 2016 · US
Multilayer Coating for Corrosion Resistant Metal Bipolar Plate for a PEMFC
US-2016233525-A1 · Aug 11, 2016 · US
Bipolar plates for use in conduction-cooled electrochemical cells
US-9413016-B2 · Aug 9, 2016 · US
Die clearance control for thin sheet stainless steel BPP forming
US-9406945-B2 · Aug 2, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/021?
- CPC H01M8/021 is the Cooperative Patent Classification code for “Alloys based on iron.”
- How many patents are filed under CPC H01M8/021 (Alloys based on iron)?
- Our database includes 422 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/021 growing?
- Publication counts under this code: 45 in 2024 vs 30 in 2025 (latest complete years).