High-strength steel sheet having excellent bendability and formability and method for manufacturing same
US-2024026485-A1 · Jan 25, 2024 · US
by interrupted quenching
by interrupted quenching · 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 | C21D1/19 |
| Official title | by interrupted quenching |
| Display label | by interrupted quenching |
| Total patents | 486 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 21 |
| 2018 | 15 |
| 2019 | 24 |
| 2020 | 24 |
| 2021 | 44 |
| 2022 | 87 |
| 2023 | 79 |
| 2024 | 75 |
| 2025 | 87 |
| 2026 | 19 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston For An Internal Combustion Engine
US-2019285024-A1 · Sep 19, 2019 · US
Cold working tool material and cold working tool manufacturing method
US-10407747-B2 · Sep 10, 2019 · US
Method for producing a ultra high strength coated or not coated steel sheet and obtained sheet
US-2019264300-A1 · Aug 29, 2019 · US
Method for producing an ultra high strength coated or not coated steel sheet and obtained sheet
US-10378077-B2 · Aug 13, 2019 · US
Hybrid quench process for hot stamping of steel parts
US-2019241987-A1 · Aug 8, 2019 · US
Method for heat treatment of stainless member, and method for producing forged stainless product
US-10370734-B2 · Aug 6, 2019 · US
Very High Strength Martensitic Steel or Part and Method of Fabrication
US-2019226060-A1 · Jul 25, 2019 · US
High-strength steel plate and manufacturing method thereof
US-2019185958-A1 · Jun 20, 2019 · US
Temporary corrosion protection layer
US-2019185981-A1 · Jun 20, 2019 · US
Increasing steel impact toughness
US-10260121-B2 · Apr 16, 2019 · US
High frequency heat treatment method of ultra-high strength parts
US-10240219-B2 · Mar 26, 2019 · US
High strength steel sheet and manufacturing method therefor
US-2019085426-A1 · Mar 21, 2019 · US
High strength hot dip galvanised steel strip
US-2018363082-A1 · Dec 20, 2018 · US
Gas quenching method
US-2018327874-A1 · Nov 15, 2018 · US
Thick steel plate for structural pipes or tubes, method of producing thick steel plate for structural pipes or tubes, and structural pipes and tubes
US-2018320257-A9 · Nov 8, 2018 · US
Method of manufacturing stainless steel pipe for oil wells and stainless steel pipe for oil wells
US-2018320243-A1 · Nov 8, 2018 · US
Bearing steel
US-10113221-B2 · Oct 30, 2018 · US
Development of nanostructure austempered ductile iron with dual phase microstructure
US-10066278-B2 · Sep 4, 2018 · US
Cable bolts
US-2018245468-A1 · Aug 30, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/19?
- CPC C21D1/19 is the Cooperative Patent Classification code for “by interrupted quenching.”
- How many patents are filed under CPC C21D1/19 (by interrupted quenching)?
- Our database includes 486 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/19 growing?
- Publication counts under this code: 75 in 2024 vs 87 in 2025 (latest complete years).