Method of treating a cemented carbide mining insert
US-12545977-B2 · Feb 10, 2026 · US
for drills; for milling cutters; for machine cutting tools
for drills; for milling cutters; for machine cutting tools · 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 | C21D9/22 |
| Official title | for drills; for milling cutters; for machine cutting tools |
| Display label | for drills; for milling cutters; for machine cutting tools |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 9 |
| 2017 | 4 |
| 2018 | 11 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Free-cutting steel and method for manufacturing same
US-12522906-B2 · Jan 13, 2026 · US
Appliance for heat treatment and method for operating the appliance
US-12479054-B2 · Nov 25, 2025 · US
Method of producing a free-cutting steel
US-2025257419-A1 · Aug 14, 2025 · US
Hot work tool steel and hot work tool
US-12312665-B2 · May 27, 2025 · US
Tool accessory and method of manufacturing same
US-2024342869-A1 · Oct 17, 2024 · US
Process for obtaining a fine-grained martensitic structure component
US-2024271239-A1 · Aug 15, 2024 · US
Tool and manufacturing method of it
US-2024173787-A1 · May 30, 2024 · US
Method of treating a mining insert
US-11898213-B2 · Feb 13, 2024 · US
Hot work tool steel and hot work tool
US-2023304135-A1 · Sep 28, 2023 · US
Free-cutting steel and method for manufacturing same
US-2023193440-A1 · Jun 22, 2023 · US
Method of treating a cemented carbide mining insert
US-2023184110-A1 · Jun 15, 2023 · US
Free-cutting steel and method of producing same
US-2023108640-A1 · Apr 6, 2023 · US
Wear-resistant armored cutting tool
US-11585216-B2 · Feb 21, 2023 · US
Method of treating a mining insert
US-2023036990-A1 · Feb 2, 2023 · US
Wear-resistant armored cutting tool
US-2022341321-A1 · Oct 27, 2022 · US
Appliance for heat treatment and method for operating the appliance
US-2022281015-A1 · Sep 8, 2022 · US
Cutting Blade for a Robotic Work Tool
US-2022030766-A1 · Feb 3, 2022 · US
Coated cutting tool, and method and system for manufacturing the same by chemical vapor deposition
US-2021354204-A1 · Nov 18, 2021 · US
Hot work tool steel and hot work tool
US-2021262071-A1 · Aug 26, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D9/22?
- CPC C21D9/22 is the Cooperative Patent Classification code for “for drills; for milling cutters; for machine cutting tools.”
- How many patents are filed under CPC C21D9/22 (for drills; for milling cutters; for machine cutting tools)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC C21D9/22 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).