Carburizer and carburization method using the same
US-2026043120-A1 · Feb 12, 2026 · US
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of ferrous surfaces
of ferrous surfaces · 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 | C23C8/66 |
| Official title | of ferrous surfaces |
| Display label | of ferrous surfaces |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cam ring and plate module for vehicle vacuum pumps, and method of manufacturing the same
US-2025250659-A1 · Aug 7, 2025 · US
Cam ring and plate module for vehicle vacuum pumps, and method of manufacturing the same
US-12312664-B2 · May 27, 2025 · US
Cam ring and plate module for vehicle vacuum pumps, and method of manufacturing the same
US-2025122601-A1 · Apr 17, 2025 · US
Guiding member, mechanical system comprising such a guiding member, and method for producing such a guiding member
US-12098744-B2 · Sep 24, 2024 · US
Method for carburizing steel member, steel component, and carburizing agent
US-11732342-B2 · Aug 22, 2023 · US
Method for carburizing steel member, steel component, and carburizing agent
US-2023227958-A1 · Jul 20, 2023 · US
Guiding Member, Mechanical System Comprising Such A Guiding Member, And Method For Producing Such A Guiding Member
US-2022220999-A1 · Jul 14, 2022 · US
Method for producing surface-hardened material
US-11332818-B2 · May 17, 2022 · US
Carburizer and carburization method using the same
US-2021404047-A1 · Dec 30, 2021 · US
Method for producing surface-hardened material
US-2021214833-A1 · Jul 15, 2021 · US
Chain element
US-11035436-B2 · Jun 15, 2021 · US
Method for forming coating film having high heat resistance, high hardness and abrasion resistance, coating film having high heat resistance, high hardness and abrasion resistance, and cutting tool comprising same
US-10597781-B2 · Mar 24, 2020 · US
Metal sheet and method for its treatment
US-10309004-B2 · Jun 4, 2019 · US
Case-hardenable stainless steel alloy
US-2018073113-A1 · Mar 15, 2018 · US
Method and steel component
US-9834837-B2 · Dec 5, 2017 · US
Process for obtaining a piston ring and internal combustion engine
US-2017327918-A1 · Nov 16, 2017 · US
Chain element
US-2016245367-A1 · Aug 25, 2016 · US
Sliding member and method for producing same
US-2016215820-A1 · Jul 28, 2016 · US
Steel Part and Method for Manufacturing the Same
US-2016138151-A1 · May 19, 2016 · US