Forged steel roll for cold rolling
US-2024383025-A1 · Nov 21, 2024 · US
for balls; for rollers
for balls; for rollers · 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 | C21D9/36 |
| Official title | for balls; for rollers |
| Display label | for balls; for rollers |
| Total patents | 66 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 10 |
| 2017 | 10 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of heat treating a steel component
US-2024084413-A1 · Mar 14, 2024 · US
Method for producing a rolling bearing component
US-2024060531-A1 · Feb 22, 2024 · US
Heat treatment method for steel product, steel product and bearing ring
US-2023147672-A1 · May 11, 2023 · US
Method for producing a rolling bearing ring having an improved robustness against the formation of white etching cracks (WEC)
US-11624403-B2 · Apr 11, 2023 · US
Rolling bearing
US-2022411891-A1 · Dec 29, 2022 · US
Method of heat treating a steel component
US-2022389559-A1 · Dec 8, 2022 · US
Heat treatment equipment and heat treatment method
US-11286535-B2 · Mar 29, 2022 · US
High surface compressive stress for through hardening
US-2022010395-A1 · Jan 13, 2022 · US
Bearing part, rolling bearing, and method for manufacturing bearing part
US-11137031-B2 · Oct 5, 2021 · US
Bearing part and rolling bearing
US-2020378442-A1 · Dec 3, 2020 · US
Heat treatment method of rod-shape workpiece
US-10844447-B2 · Nov 24, 2020 · US
Method for producing a rolling bearing ring having an improved robustness against the formation of white etching cracks (wec)
US-2020300303-A1 · Sep 24, 2020 · US
Shot ball having excellent strength and wear resistance and method for manufacturing same
US-2020087763-A1 · Mar 19, 2020 · US
Work piece conveyance jig and conveyance device provided with same, and induction heating device
US-10577187-B2 · Mar 3, 2020 · US
Bearing part, rolling bearing, and method for manufacturing bearing part
US-2020003259-A1 · Jan 2, 2020 · US
Method of imparting compressive residual stress to balls
US-10480578-B2 · Nov 19, 2019 · US
Work piece conveyance jig and conveyance device provided with same, and induction heating device
US-2019270595-A1 · Sep 5, 2019 · US
Heat treatment method of rod-shape workpiece
US-2019241986-A1 · Aug 8, 2019 · US
Induction heating apparatus and induction heating method
US-2019239291-A1 · Aug 1, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D9/36?
- CPC C21D9/36 is the Cooperative Patent Classification code for “for balls; for rollers.”
- How many patents are filed under CPC C21D9/36 (for balls; for rollers)?
- Our database includes 66 publications tagged with this CPC code.
- Is patent activity under CPC C21D9/36 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).