Stabilizer
US-2017349962-A1 · Dec 7, 2017 · US
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor · 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 | C21D9/00 |
| Official title | Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor |
| Display label | Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor |
| Total patents | 362 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 24 |
| 2017 | 32 |
| 2018 | 34 |
| 2019 | 32 |
| 2020 | 33 |
| 2021 | 33 |
| 2022 | 44 |
| 2023 | 32 |
| 2024 | 34 |
| 2025 | 34 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Processes for reducing flatness deviations in alloy articles
US-9822422-B2 · Nov 21, 2017 · US
High temperature, radiation-resistant, ferritic-martensitic steels
US-2017292179-A1 · Oct 12, 2017 · US
Solid State Grain Alignment Of Permanent Magets in Near-Final Shape
US-2017283893-A1 · Oct 5, 2017 · US
Ferritic stainless steel foil and method for manufacturing the same (as amended)
US-2017275725-A1 · Sep 28, 2017 · US
Bearing steel and method for producing same
US-9732407-B2 · Aug 15, 2017 · US
Method and apparatus for controlling a furnace pressure of a continuous annealing furnace
US-9727061-B2 · Aug 8, 2017 · US
Steel for bolts, and bolt
US-2017219000-A1 · Aug 3, 2017 · US
Steel wire for bolts, bolt, and methods for manufacturing same
US-2017159693-A1 · Jun 8, 2017 · US
Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
US-2017029915-A1 · Feb 2, 2017 · US
Stainless steel brake disc and method for production thereof
US-9523402-B2 · Dec 20, 2016 · US
Turbine blade manufacturing method
US-2016339507-A1 · Nov 24, 2016 · US
Hot-formed member and method of manufacturing same
US-2016326608-A1 · Nov 10, 2016 · US
Method for producing a motor vehicle axle component
US-9475107-B2 · Oct 25, 2016 · US
Process for producing hot press-formed product
US-9475113-B2 · Oct 25, 2016 · US
Insulation enclosure with compliant independent members
US-2016305191-A1 · Oct 20, 2016 · US
Manufacturing method of mechanical component using martensitic stainless steel, rotating device, rolling bearing and rolling bearing unit
US-2016289785-A1 · Oct 6, 2016 · US
R-t-b-based rare earth sintered magnet and method of manufacturing same
US-2016284452-A1 · Sep 29, 2016 · US
Heat treatment method
US-9423183-B2 · Aug 23, 2016 · US
Method for heat treatment of stainless member, and method for producing forged stainless product
US-2016237517-A1 · Aug 18, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D9/00?
- CPC C21D9/00 is the Cooperative Patent Classification code for “Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor.”
- How many patents are filed under CPC C21D9/00 (Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor)?
- Our database includes 362 publications tagged with this CPC code.
- Is patent activity under CPC C21D9/00 growing?
- Publication counts under this code: 34 in 2024 vs 34 in 2025 (latest complete years).