Manufacturing method of metal component and manufacturing method of electronic apparatus
US-2017362715-A1 · Dec 21, 2017 · US
for etching iron group metals
for etching iron group metals · 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 | C23F1/28 |
| Official title | for etching iron group metals |
| Display label | for etching iron group metals |
| Total patents | 355 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 19 |
| 2017 | 16 |
| 2018 | 33 |
| 2019 | 35 |
| 2020 | 38 |
| 2021 | 41 |
| 2022 | 38 |
| 2023 | 37 |
| 2024 | 35 |
| 2025 | 27 |
| 2026 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Removing material with nitric acid and hydrogen peroxide solution
US-2017356092-A1 · Dec 14, 2017 · US
Process for NiFe fluxgate device
US-9840781-B2 · Dec 12, 2017 · US
Coating method for clad steel and coating solution for coating clad steel
US-2017335480-A1 · Nov 23, 2017 · US
Method for chemical etching of a needle cannula
US-9822455-B2 · Nov 21, 2017 · US
Method for producing metal-plated stainless material
US-2017327953-A1 · Nov 16, 2017 · US
Polycrystalline diamond compacts
US-9808910-B2 · Nov 7, 2017 · US
Electronic product metal shell with an antenna groove and method of manufacturing the same
US-2017288720-A1 · Oct 5, 2017 · US
Method of preparing polycrystalline diamond from derivatized nanodiamond
US-9776151-B2 · Oct 3, 2017 · US
High-entropy alloy foam and manufacturing method for the foam
US-2017218480-A1 · Aug 3, 2017 · US
Method for manufacturing a metallic component which is possible to pickle
US-2017113274-A1 · Apr 27, 2017 · US
Substrate for suspension, process for producing the same, suspension for magnetic head, and hard disk drive
US-2017103777-A1 · Apr 13, 2017 · US
Crystalline magnetic layer to amorphous substrate bonding
US-9595274-B2 · Mar 14, 2017 · US
Substrate for suspension, process for producing the same, suspension for magnetic head, and hard disk drive
US-9564153-B2 · Feb 7, 2017 · US
Thin film type coil component and method of manufacturing the same
US-2017004917-A1 · Jan 5, 2017 · US
Removal composition for selectively removing hard mask and methods thereof
US-2016312162-A1 · Oct 27, 2016 · US
Leaching ultrahard materials by enhanced demetalyzation
US-2016280552-A1 · Sep 29, 2016 · US
Removal Composition for Selectively Removing Hard Mask and Methods Thereof
US-2016254182-A1 · Sep 1, 2016 · US
Metal plate, method of manufacturing metal plate, and method of manufacturing deposition mask by use of metal plate
US-2016237546-A1 · Aug 18, 2016 · US
Methods for characterizing a polycrystalline diamond element by porosimetry
US-2016229752-A1 · Aug 11, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23F1/28?
- CPC C23F1/28 is the Cooperative Patent Classification code for “for etching iron group metals.”
- How many patents are filed under CPC C23F1/28 (for etching iron group metals)?
- Our database includes 355 publications tagged with this CPC code.
- Is patent activity under CPC C23F1/28 growing?
- Publication counts under this code: 35 in 2024 vs 27 in 2025 (latest complete years).