Laser Shock Peening Method for Improving the Corrosion Resistance of Sintered Nd-Fe-B Magnet
US-2021407711-A1 · Dec 30, 2021 · US
protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706)
protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F41/026 |
| Official title | {protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706)} |
| Display label | protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706) |
| Total patents | 116 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 10 |
| 2017 | 8 |
| 2018 | 11 |
| 2019 | 7 |
| 2020 | 10 |
| 2021 | 14 |
| 2022 | 13 |
| 2023 | 13 |
| 2024 | 17 |
| 2025 | 6 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fabrication process to produce a toroidal current transformer
US-11152152-B2 · Oct 19, 2021 · US
Intravascular blood pump comprising corrosion resistant permanent magnet
US-11107626-B2 · Aug 31, 2021 · US
Method for forming coating film on rare earth magnet surface, and rare earth magnet
US-2021146709-A1 · May 20, 2021 · US
Forming method for producing a composite part having a permanent magnet
US-11004601-B2 · May 11, 2021 · US
Method of producing magnetic powder
US-2021098161-A1 · Apr 1, 2021 · US
Corrosion-resistant permanent magnet and intravascular blood pump comprising the magnet
US-2021098166-A1 · Apr 1, 2021 · US
Magnet and motor using the same
US-10964464-B2 · Mar 30, 2021 · US
Rare earth magnets
US-2021065973-A1 · Mar 4, 2021 · US
Composite magnetic powder, powder magnetic core using the same, and manufacturing method for composite magnetic powder
US-2021027923-A1 · Jan 28, 2021 · US
Method for forming electrolytic copper plating film on surface of rare earth metal-based permanent magnet
US-10770224-B2 · Sep 8, 2020 · US
Rare earth magnet and motor
US-10726983-B2 · Jul 28, 2020 · US
Method for manufacturing soft magnetic member
US-2020224302-A1 · Jul 16, 2020 · US
Fabrication process to produce a toroidal current transformer
US-2020176182-A1 · Jun 4, 2020 · US
Rare earth sintered magnet
US-2020111591-A1 · Apr 9, 2020 · US
Bonded magnet and method of preparing the same
US-2020105445-A1 · Apr 2, 2020 · US
Compression-bonded magnet with case and method for producing the same
US-10600541-B2 · Mar 24, 2020 · US
Rare earth magnet and motor including the same
US-10586636-B2 · Mar 10, 2020 · US
Corrosion resistant magnet assembly
US-10553352-B2 · Feb 4, 2020 · US
Permanent magnet, method for manufacturing same, and motor comprising same
US-2020028391-A1 · Jan 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F41/026?
- CPC H01F41/026 is the Cooperative Patent Classification code for “protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706).”
- How many patents are filed under CPC H01F41/026 (protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706))?
- Our database includes 116 publications tagged with this CPC code.
- Is patent activity under CPC H01F41/026 growing?
- Publication counts under this code: 17 in 2024 vs 6 in 2025 (latest complete years).