Stainless steel for fuel cell separator with excellent surface hydrophilicity and electrical conductivity, and manufacturing method thereof
US-2023420697-A1 · Dec 28, 2023 · US
Iron or steel
Iron or steel · 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 | C25F1/06 |
| Official title | Iron or steel |
| Display label | Iron or steel |
| Total patents | 72 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 10 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 14 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Austenitic stainless steel for polymer fuel cell separator with improved contact resistance and manufacturing method thereof
US-2023420698-A1 · Dec 28, 2023 · US
Ferritic stainless steel and component for exhaust gas
US-2023383390-A1 · Nov 30, 2023 · US
Exterior material of home appliance, home appliance including exterior material and manufacturing method of exterior material of home appliance
US-11655533-B2 · May 23, 2023 · US
Electro-assisted pickling of steel
US-2022411952-A1 · Dec 29, 2022 · US
Method for manufacturing stainless steel for polymer fuel cell separator
US-2022393188-A1 · Dec 8, 2022 · US
Stainless steel for separation plate of polymer electrolyte membrane fuel cell having improved hydrophilic property and corrosion resistance, and manufacturing method therefor
US-2022359888-A1 · Nov 10, 2022 · US
Cold-rolled flat steel product having metal anti-corrosion layer and method for producing same
US-11473160-B2 · Oct 18, 2022 · US
Use of focused accelerated corrosion for metal decommissioning
US-2022316072-A1 · Oct 6, 2022 · US
Ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, and method for maufacturing same
US-2022263095-A1 · Aug 18, 2022 · US
Chromium-containing steel sheet for current collector of nonaqueous electrolyte secondary battery and method for manufacturing the same
US-2022246943-A1 · Aug 4, 2022 · US
Stainless steel for separation plate of polymer electrolyte membrane fuel cell having improved hydrophilic property and corrosion resistance, and manufacturing method therefor
US-11398631-B2 · Jul 26, 2022 · US
Hot-dip Sn—Zn-based alloy-plated steel sheet
US-11371130-B2 · Jun 28, 2022 · US
Pretreatment method for pretreating components prior to electroplating
US-2022190562-A1 · Jun 16, 2022 · US
Method for manufacturing of stainless steel strips
US-2022177989-A1 · Jun 9, 2022 · US
Austenitic stainless steel sheet for fuel cell separators and production method therefor
US-2022085388-A1 · Mar 17, 2022 · US
Passivation surface treatment of stainless steel
US-11230782-B2 · Jan 25, 2022 · US
Method for the surface treatment of a metal or alloy product, and metal or alloy product
US-2022002896-A1 · Jan 6, 2022 · US
Methods and systems for electrochemical deposition of metal from ionic liquids including imidazolium tetrahalo-metallates
US-2021388520-A1 · Dec 16, 2021 · US
Method for manufacturing stainless steel for polymer fuel cell separator having excellent contact resistance
US-2021269920-A1 · Sep 2, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25F1/06?
- CPC C25F1/06 is the Cooperative Patent Classification code for “Iron or steel.”
- How many patents are filed under CPC C25F1/06 (Iron or steel)?
- Our database includes 72 publications tagged with this CPC code.
- Is patent activity under CPC C25F1/06 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).