Method for Manufacturing an Austenitic Steel Component and Use of the Component
US-2018334735-A1 · Nov 22, 2018 · US
Direct resistance heating
Direct resistance heating · 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 | C21D1/40 |
| Official title | Direct resistance heating |
| Display label | Direct resistance heating |
| Total patents | 149 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 18 |
| 2016 | 14 |
| 2017 | 21 |
| 2018 | 14 |
| 2019 | 17 |
| 2020 | 15 |
| 2021 | 9 |
| 2022 | 11 |
| 2023 | 6 |
| 2024 | 12 |
| 2025 | 9 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Device and method for tempering sections of metal components
US-2018237872-A1 · Aug 23, 2018 · US
Increasing steel impact toughness
US-2018223385-A1 · Aug 9, 2018 · US
Method for producing stabilizer and heating device
US-9969237-B2 · May 15, 2018 · US
Hollow stabilizer
US-9969238-B2 · May 15, 2018 · US
Stabilizer and method for manufacturing same
US-2018072127-A1 · Mar 15, 2018 · US
Current applying apparatus, current applying method and direct resistance heating apparatus
US-9907118-B2 · Feb 27, 2018 · US
Methods for shaping high aspect ratio articles from metallic glass alloys using rapid capacitive discharge and metallic glass feedstock for use in such methods
US-9845523-B2 · Dec 19, 2017 · US
Heating method, heating apparatus, and fabrication method for press-molded article
US-2017314094-A1 · Nov 2, 2017 · US
Heat treatment apparatus for hot stamping and forming method using the same
US-9790564-B2 · Oct 17, 2017 · US
Continuous tailor heat-treated blanks
US-2017247774-A1 · Aug 31, 2017 · US
Forming of metallic glass by rapid capacitor discharge
US-9745641-B2 · Aug 29, 2017 · US
Hydrogen free amorphous silicon as insulating dielectric material for superconducting quantum bits
US-9741921-B2 · Aug 22, 2017 · US
Method for producing aluminum wire
US-2017226615-A1 · Aug 10, 2017 · US
Method for heating steel sheets and device for carrying out the method
US-2017218473-A1 · Aug 3, 2017 · US
Hot forming line and method for producing a hot formed and press hardened motor vehicle part
US-9694408-B2 · Jul 4, 2017 · US
Electric heating device
US-9689049-B2 · Jun 27, 2017 · US
Highly alloyed stainless steel forgings made without solution anneal
US-2017166986-A1 · Jun 15, 2017 · US
Heating method, heating apparatus and method of manufacturing press-molded article
US-2017164425-A1 · Jun 8, 2017 · US
Site conditions thick-wall P92 pipe local heat treatment method
US-9663841-B2 · May 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/40?
- CPC C21D1/40 is the Cooperative Patent Classification code for “Direct resistance heating.”
- How many patents are filed under CPC C21D1/40 (Direct resistance heating)?
- Our database includes 149 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/40 growing?
- Publication counts under this code: 12 in 2024 vs 9 in 2025 (latest complete years).