Low-density clad steel sheet having excellent formability and fatigue property and manufacturing method therefor
US-2024326399-A1 · Oct 3, 2024 · US
Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten") · 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 | C21D1/25 |
| Official title | Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten") |
| Display label | Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten") |
| Total patents | 733 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 30 |
| 2016 | 35 |
| 2017 | 36 |
| 2018 | 42 |
| 2019 | 54 |
| 2020 | 32 |
| 2021 | 60 |
| 2022 | 100 |
| 2023 | 106 |
| 2024 | 112 |
| 2025 | 103 |
| 2026 | 23 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Wire rod and part with improved delayed fracture resistance, and methods for manufacturing same
US-2024060162-A1 · Feb 22, 2024 · US
Two-phase stainless steel, method of manufacturing the same, and diaphragm, pressure sensor, and diaphragm valve using two-phase stainless steel
US-9523620-B2 · Dec 20, 2016 · US
Razor blade steel
US-2016361828-A1 · Dec 15, 2016 · US
Steel strip for cutlery
US-2016362770-A1 · Dec 15, 2016 · US
Air vent
US-9513027-B2 · Dec 6, 2016 · US
Hot work tool material and method for manufacturing hot work tool
US-2016348202-A1 · Dec 1, 2016 · US
Method for improving the structure of a steel component after heating and stell component obtained by the method
US-2016348204-A1 · Dec 1, 2016 · US
Aircraft engine shaft comprising a maraging steel having a tensile strength of 2300MPa or more
US-9506125-B2 · Nov 29, 2016 · US
Maraging steel
US-2016340752-A1 · Nov 24, 2016 · US
Thick-walled high-strength hot rolled steel sheet with excellent low-temperature toughness and method of producing same
US-9493865-B2 · Nov 15, 2016 · US
Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part
US-2016251743-A1 · Sep 1, 2016 · US
High tensile strength steel wire
US-2016237518-A1 · Aug 18, 2016 · US
Method of fabricating a nitrided low-alloy steel part
US-2016237545-A1 · Aug 18, 2016 · US
Steel for high-strength bolts which has excellent delayed fracture resistance and bolt formability, and bolt
US-2016230260-A1 · Aug 11, 2016 · US
Steel for spring, and method for producing spring
US-2016222497-A1 · Aug 4, 2016 · US
Rolling device
US-2016208854-A1 · Jul 21, 2016 · US
Process for producing non quenched and tempered steel
US-2016208357-A1 · Jul 21, 2016 · US
Steel Having Superior Rolling Fatigue Life
US-2016201174-A1 · Jul 14, 2016 · US
High-yield-ratio, high-strength cold rolled steel sheet and production method therefor
US-2016177427-A1 · Jun 23, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/25?
- CPC C21D1/25 is the Cooperative Patent Classification code for “Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten").”
- How many patents are filed under CPC C21D1/25 (Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten"))?
- Our database includes 733 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/25 growing?
- Publication counts under this code: 112 in 2024 vs 103 in 2025 (latest complete years).