Method for producing a re-shaped component from a manganese-containing flat steel product and such a component
US-11519050-B2 · Dec 6, 2022 · US
Hardening by cooling below 0 degrees Celsius
Hardening by cooling below 0 degrees Celsius · 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 | C21D6/04 |
| Official title | Hardening by cooling below 0 degrees Celsius |
| Display label | Hardening by cooling below 0 degrees Celsius |
| Total patents | 96 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 10 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 16 |
| 2020 | 5 |
| 2021 | 8 |
| 2022 | 11 |
| 2023 | 9 |
| 2024 | 15 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Duplex stainless steel and manufacturing method thereof
US-11512374-B2 · Nov 29, 2022 · US
Components formed with high strength steel
US-2022349370-A1 · Nov 3, 2022 · US
Steel for knives, steel for martensitic knives, knife, and production method for steel for martensitic knives
US-2022340988-A1 · Oct 27, 2022 · US
Case-hardened steel part for use in aeronautics
US-2022290268-A1 · Sep 15, 2022 · US
Corrosion pitting resistant martensitic stainless steel and method for making same
US-2022290267-A1 · Sep 15, 2022 · US
Blade material
US-11306370-B2 · Apr 19, 2022 · US
Method of producing additively manufactured object and additively manufactured object
US-2021331247-A1 · Oct 28, 2021 · US
Steel for molds and molding tool
US-11141778-B2 · Oct 12, 2021 · US
Cryogenic laser shock strengthening method and apparatus based on laser-induced high temperature plasma technology
US-2021277491-A1 · Sep 9, 2021 · US
Cryogenic workbench, cryogenic laser peening experiment system and control method therefor
US-2021277496-A1 · Sep 9, 2021 · US
Ultra-high strength maraging stainless steel with salt-water corrosion resistance
US-11085093-B2 · Aug 10, 2021 · US
Steel sheet for hot stamping
US-11027522-B2 · Jun 8, 2021 · US
Duplex stainless steel and manufacturing method thereof
US-2021108297-A1 · Apr 15, 2021 · US
Bimetallic screw with martensitically hardenable steel
US-2021054866-A1 · Feb 25, 2021 · US
Manufacturing method of mechanical component using martensitic stainless steel, rotating device, rolling bearing and rolling bearing unit
US-10851433-B2 · Dec 1, 2020 · US
Zinc-coated hot formed steel component with tailored property
US-10619223-B2 · Apr 14, 2020 · US
Steel sheet for hot stamping
US-2020094525-A1 · Mar 26, 2020 · US
Ultra-high strength maraging stainless steel with salt-water corrosion resistance
US-2020071782-A1 · Mar 5, 2020 · US
Martensitically hardenable steel and use thereof, in particular for producing a screw
US-2020063231-A1 · Feb 27, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D6/04?
- CPC C21D6/04 is the Cooperative Patent Classification code for “Hardening by cooling below 0 degrees Celsius.”
- How many patents are filed under CPC C21D6/04 (Hardening by cooling below 0 degrees Celsius)?
- Our database includes 96 publications tagged with this CPC code.
- Is patent activity under CPC C21D6/04 growing?
- Publication counts under this code: 15 in 2024 vs 6 in 2025 (latest complete years).