High-strength steel sheet having excellent bendability and formability and method for manufacturing same
US-2024026485-A1 · Jan 25, 2024 · US
Martempering
Martempering · 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 | C21D1/22 |
| Official title | Martempering |
| Display label | Martempering |
| Total patents | 281 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 8 |
| 2017 | 18 |
| 2018 | 12 |
| 2019 | 23 |
| 2020 | 20 |
| 2021 | 24 |
| 2022 | 41 |
| 2023 | 33 |
| 2024 | 47 |
| 2025 | 35 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High strength seamless stainless steel pipe and method for producing same
US-2019368001-A1 · Dec 5, 2019 · US
High-strength seamless steel pipe for oil country tubular goods and method of producing the same
US-10472690-B2 · Nov 12, 2019 · US
Niobium and chromium low alloy carbon steel for high wear resistant automotive chain link plates
US-2019211415-A1 · Jul 11, 2019 · US
Blade material
US-2019211418-A1 · Jul 11, 2019 · US
Steel plate member and method of producing the same
US-2019185957-A1 · Jun 20, 2019 · US
Flat steel product and method for the production thereof
US-2019119774-A1 · Apr 25, 2019 · US
Nanostructured ferritic alloy components and related articles
US-10260370-B2 · Apr 16, 2019 · US
Method for deriving cooling time when quenching steel material, method for quenching steel material, and method for quenching and tempering steel material
US-2018347006-A1 · Dec 6, 2018 · US
Gas quenching method
US-2018327874-A1 · Nov 15, 2018 · US
Method for producing bearing ring and method for producing double row tapered roller bearing
US-2018320737-A1 · Nov 8, 2018 · US
Cooling device and thermal treatment device
US-2018274049-A1 · Sep 27, 2018 · US
Cable bolts
US-2018245468-A1 · Aug 30, 2018 · US
Steel for molds and molding tool
US-2018229294-A1 · Aug 16, 2018 · US
Heat-treated steel sheet member and method for producing the same
US-2018171429-A1 · Jun 21, 2018 · US
Cold work tool material, cold work tool and method for manufacturing same
US-9994925-B2 · Jun 12, 2018 · US
Heat-treated steel sheet member and method for producing the same
US-2018135145-A1 · May 17, 2018 · US
Hot-press molding method and hot-press molded product
US-2018135147-A1 · May 17, 2018 · US
High-strength spring steel wire with excellent hydrogen embrittlement resistance, manufacturing process therefor, and high-strength spring
US-9970072-B2 · May 15, 2018 · US
Method of manufacturing a flexible externally toothed gear for strain wave gearing
US-9874273-B2 · Jan 23, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/22?
- CPC C21D1/22 is the Cooperative Patent Classification code for “Martempering.”
- How many patents are filed under CPC C21D1/22 (Martempering)?
- Our database includes 281 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/22 growing?
- Publication counts under this code: 47 in 2024 vs 35 in 2025 (latest complete years).