Metal surface layer treating method, metal assembly and electronic device
US-12378664-B2 · Aug 5, 2025 · US
Heating by cathodic discharges
Heating by cathodic discharges · 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 | C21D1/38 |
| Official title | Heating by cathodic discharges |
| Display label | Heating by cathodic discharges |
| Total patents | 43 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 8 |
| 2017 | 6 |
| 2018 | 8 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 1 |
| 2023 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for treating a part made of ferrous metal, and part made of ferrous metal
US-12276032-B2 · Apr 15, 2025 · US
Method for improving the formability of steel blanks
US-12270086-B2 · Apr 8, 2025 · US
Metal surface layer treating method, metal assembly and electronic device
US-2023097354-A1 · Mar 30, 2023 · US
Method for treating a part made of ferrous metal, and part made of ferrous metal
US-2023029324-A1 · Jan 26, 2023 · US
Method for improving the formability of steel blanks
US-2021180144-A1 · Jun 17, 2021 · US
Method and device for additive production of at least one component layer of a component, and storage medium
US-2020198010-A1 · Jun 25, 2020 · US
Method and device for implementing laser shock peening or warm laser shock peening during selective laser melting
US-10596661-B2 · Mar 24, 2020 · US
Grain-oriented electrical steel sheet and method for manufacturing the same
US-10535453-B2 · Jan 14, 2020 · US
Device, method, and system for cooling a flat object in a nonhomogeneous manner
US-10391572-B2 · Aug 27, 2019 · US
Grain-oriented electrical steel sheet and method of manufacturing the same
US-10395806-B2 · Aug 27, 2019 · US
Grain-oriented electrical steel sheet and method for improving iron loss properties thereof
US-10062483-B2 · Aug 28, 2018 · US
Steel sheet inspection device, steel sheet inspection method, and steel sheet manufacturing method
US-10031068-B2 · Jul 24, 2018 · US
Grain-oriented electrical steel sheet and method for producing same
US-10020101-B2 · Jul 10, 2018 · US
Grain-oriented electrical steel sheet and manufacturing method thereof
US-10011886-B2 · Jul 3, 2018 · US
Grain-oriented electrical steel sheet and method of manufacturing same
US-9984800-B2 · May 29, 2018 · US
In-line laser scanner for controlled cooling rates of direct metal laser melting
US-2018141160-A1 · May 24, 2018 · US
Methods for constructing parts using metallic glass alloys, and metallic glass alloy materials for use therewith
US-9970079-B2 · May 15, 2018 · US
Device, method, and system for cooling a flat object in a nonhomogeneous manner
US-2018050406-A1 · Feb 22, 2018 · US
Grain-oriented electrical steel sheet
US-9761361-B2 · Sep 12, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/38?
- CPC C21D1/38 is the Cooperative Patent Classification code for “Heating by cathodic discharges.”
- How many patents are filed under CPC C21D1/38 (Heating by cathodic discharges)?
- Our database includes 43 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/38 growing?
- Publication counts under this code: 2 in 2023 vs 3 in 2025 (latest complete years).