High-strength thick hot-rolled steel sheet having excellent elongation and method for manufacturing same
US-2023349021-A1 · Nov 2, 2023 · US
characterised by the quenching agents
characterised by the quenching agents · 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 | C21D1/56 |
| Official title | characterised by the quenching agents |
| Display label | characterised by the quenching agents |
| Total patents | 80 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 8 |
| 2017 | 3 |
| 2018 | 7 |
| 2019 | 11 |
| 2020 | 7 |
| 2021 | 8 |
| 2022 | 3 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Steel plate for torsion beam and manufacturing method therefor, and torsion beam and manufacturing method therefor
US-2023295787-A1 · Sep 21, 2023 · US
Multi-thickness welded vehicle structure
US-11761052-B2 · Sep 19, 2023 · US
Method for producing hot-dip galvanized steel sheet and continuous hot-dip galvanizing apparatus
US-11718889-B2 · Aug 8, 2023 · US
Multi-thickness welded vehicle structure
US-2023183831-A1 · Jun 15, 2023 · US
Steel for glass lining and production method therefor
US-2023114417-A1 · Apr 13, 2023 · US
Steel material for vacuum tube and method of manufacturing same
US-2023024943-A1 · Jan 26, 2023 · US
Hammer bushings with hardened inner region
US-2022412406-A1 · Dec 29, 2022 · US
Normalizing heat-treated steel sheet having good low-temperature impact toughness and method for manufacturing same
US-2022403479-A1 · Dec 22, 2022 · US
Air-hardened machine components
US-2022195550-A1 · Jun 23, 2022 · US
Hybrid quench process for hot stamping of steel parts
US-11198915-B2 · Dec 14, 2021 · US
Heat exchange method, heat exchange medium, heat exchange device, patenting method, and carbon-steel wire
US-2021355561-A1 · Nov 18, 2021 · US
Thin steel sheet and method for manufacturing the same
US-2021310092-A1 · Oct 7, 2021 · US
Method of a heat transfer of a non-metallic or metallic item
US-11118091-B2 · Sep 14, 2021 · US
Method for heat treating a horological component
US-2021238701-A1 · Aug 5, 2021 · US
Method of a heat transfer of a non-metallic or metallic item
US-10994327-B2 · May 4, 2021 · US
Seamless steel pipe heat-treatment-finishing-treatment continuous facility
US-2021025021-A1 · Jan 28, 2021 · US
Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor
US-10889874-B2 · Jan 12, 2021 · US
Method for producing hot-dip galvanized steel sheet and continuous hot-dip galvanizing apparatus
US-2020377964-A1 · Dec 3, 2020 · US
Method of heat transfer between a metallic or non-metallic item and a heat transfer fluid
US-10844261-B2 · Nov 24, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/56?
- CPC C21D1/56 is the Cooperative Patent Classification code for “characterised by the quenching agents.”
- How many patents are filed under CPC C21D1/56 (characterised by the quenching agents)?
- Our database includes 80 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/56 growing?
- Publication counts under this code: 9 in 2024 vs 8 in 2025 (latest complete years).