Method for continuously casting slab
US-10118218-B2 · Nov 6, 2018 · US
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering · 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 | C21D1/00 |
| Official title | General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering |
| Display label | General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering |
| Total patents | 196 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 18 |
| 2016 | 21 |
| 2017 | 18 |
| 2018 | 21 |
| 2019 | 17 |
| 2020 | 31 |
| 2021 | 20 |
| 2022 | 21 |
| 2023 | 14 |
| 2024 | 7 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Steel sheet for hot press-forming
US-10093077-B2 · Oct 9, 2018 · US
Cooling device and thermal treatment device
US-2018274049-A1 · Sep 27, 2018 · US
High-strength thick-walled electric resistance welded steel pipe having excellent low-temperature toughness and method of manufacturing the same
US-9841124-B2 · Dec 12, 2017 · US
Method of quenching steel pipe, apparatus for quenching steel pipe, method of manufacturing steel pipe and facility for manufacturing steel pipe
US-2017349965-A1 · Dec 7, 2017 · US
Multi-chamber heat treatment device
US-2017307296-A1 · Oct 26, 2017 · US
WJP execution method for reactor vessel lid and jigs
US-9789585-B2 · Oct 17, 2017 · US
Two-phase alloy, product using said two-phase alloy, and method for producing said product
US-2017292175-A1 · Oct 12, 2017 · US
Method and apparatus for controlling the strip temperature of the rapid cooling section of a continuous annealing line
US-9783867-B2 · Oct 10, 2017 · US
Induction heating device for metal strip
US-2017290102-A1 · Oct 5, 2017 · US
Methods for marking and marked articles using additive manufacturing technique
US-9771629-B2 · Sep 26, 2017 · US
Methods for processing bonded dual alloy rotors including differential heat treatment processes
US-2017268089-A1 · Sep 21, 2017 · US
Induction heating device for metal strip
US-2017260604-A1 · Sep 14, 2017 · US
High-carbon iron-based amorphous alloy using molten pig iron and method of manufacturing the same
US-9752205-B2 · Sep 5, 2017 · US
Method for heat treating a metal tube or pipe, metal tube or pipe, and heat treatment furnace
US-9745642-B2 · Aug 29, 2017 · US
Heat treatment device and cooling device
US-2017175214-A1 · Jun 22, 2017 · US
Permanent magnet, motor, and generator
US-2017148568-A1 · May 25, 2017 · US
Implant having high fatigue resistance, delivery system, and method of use
US-9629734-B2 · Apr 25, 2017 · US
Cooling apparatus and multi-chamber heat treatment apparatus
US-2017081737-A1 · Mar 23, 2017 · US
Method of local heat treatment for collision parts of vehicle using high frequency signal
US-2017073782-A1 · Mar 16, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/00?
- CPC C21D1/00 is the Cooperative Patent Classification code for “General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering.”
- How many patents are filed under CPC C21D1/00 (General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering)?
- Our database includes 196 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/00 growing?
- Publication counts under this code: 7 in 2024 vs 6 in 2025 (latest complete years).