Device for cooling a steel strip
US-12465966-B2 · Nov 11, 2025 · US
with circulating liquids
with circulating liquids · 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 | C21D1/64 |
| Official title | with circulating liquids |
| Display label | with circulating liquids |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 3 |
| 2024 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Quenching method
US-12378620-B2 · Aug 5, 2025 · US
Quenching apparatus, continuous annealing facility, quenching method, method for manufacturing steel sheet, and method for manufacturing coated steel sheet
US-2025129443-A1 · Apr 24, 2025 · US
Quenching apparatus, continuous annealing facility, quenching method, method for manufacturing steel sheet, and method for manufacturing coated steel sheet
US-2025129445-A1 · Apr 24, 2025 · US
Methods and systems for vacuum and oil austempering in producing bainite
US-2024093321-A1 · Mar 21, 2024 · US
Device for cooling a steel strip
US-2022226872-A1 · Jul 21, 2022 · US
Lead-free patenting process and equipment
US-11299795-B2 · Apr 12, 2022 · US
Quenching method
US-2022106653-A1 · Apr 7, 2022 · US
Reactive quenching solutions and methods of use
US-11118253-B2 · Sep 14, 2021 · US
Method of heat transfer and associated device
US-2021222954-A1 · Jul 22, 2021 · US
Wall member useful in quenching
US-11001903-B2 · May 11, 2021 · US
Heat recovery system
US-2020124363-A1 · Apr 23, 2020 · US
Bearing ring for roller bearing, method for manufacturing the same, and roller bearing
US-10578162-B2 · Mar 3, 2020 · US
Lead-free patenting process and equipment
US-2019345578-A1 · Nov 14, 2019 · US
Method and equipment for controlled patenting of steel wire
US-2019338390-A1 · Nov 7, 2019 · US
Forced water cooling of thick steel wires
US-10400319-B2 · Sep 3, 2019 · US
Quenching apparatus and method for producing metallic material
US-10329634-B2 · Jun 25, 2019 · US
Reactive quenching solutions and methods of use
US-2019119798-A1 · Apr 25, 2019 · US
Bearing ring for roller bearing, method for manufacturing the same, and roller bearing
US-2019107152-A1 · Apr 11, 2019 · US
Cooling tank for rails
US-9976818-B2 · May 22, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/64?
- CPC C21D1/64 is the Cooperative Patent Classification code for “with circulating liquids.”
- How many patents are filed under CPC C21D1/64 (with circulating liquids)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/64 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).