Iron-based nanoparticles and grains
US-12512238-B2 · Dec 30, 2025 · US
obtained by a reduction
obtained by a reduction · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F1/065 |
| Official title | {obtained by a reduction} |
| Display label | obtained by a reduction |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 3 |
| 2018 | 8 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Applied magnetic field synthesis and processing of iron nitride magnetic materials
US-12338536-B2 · Jun 24, 2025 · US
Rare earth metal recovery
US-2025137158-A1 · May 1, 2025 · US
Anisotropic samarium-iron-nitrogen magnetic alloy powder and preparation method therefor
US-2024212899-A1 · Jun 27, 2024 · US
Magnetic material including α″-Fe16(NxZ1-x)2 or a mixture of α″-Fe16Z2 and α″-Fe16N2, where Z includes at least one of C, B, or O
US-12018386-B2 · Jun 25, 2024 · US
Rare earth-iron-nitrogen-based magnetic powder, compound for bonded magnet, bonded magnet, and method for producing rare earth-iron-nitrogen-based magnetic powder
US-11990259-B2 · May 21, 2024 · US
Iron nitride compositions
US-2024076764-A1 · Mar 7, 2024 · US
Iron-based nanoparticles and grains
US-2024055165-A1 · Feb 15, 2024 · US
Iron nitride compositions
US-11859271-B2 · Jan 2, 2024 · US
Iron-based nanoparticles and grains
US-11837393-B2 · Dec 5, 2023 · US
Magnetic material and method for producing same
US-11732336-B2 · Aug 22, 2023 · US
Rare earth-iron-nitrogen-based magnetic powder, compound for bonded magnet, bonded magnet, and method for producing rare earth-iron-nitrogen-based magnetic powder
US-2023245807-A1 · Aug 3, 2023 · US
Method for producing anisotropic magnetic powder, and anisotropic magnetic powder
US-2023238161-A1 · Jul 27, 2023 · US
Magnetic powder containing Sm—Fe—N-based crystal particles, sintered magnet produced from same, method for producing said magnetic powder, and method for producing said sintered magnet
US-11594353-B2 · Feb 28, 2023 · US
Iron nitride powder with anisotropic shape
US-2023024845-A1 · Jan 26, 2023 · US
Iron nitride powder with anisotropic shape
US-11511344-B2 · Nov 29, 2022 · US
Iron nitride nanoparticle suspension
US-2022354973-A1 · Nov 10, 2022 · US
Iron nitride compositions
US-2022098711-A1 · Mar 31, 2022 · US
Iron-based nanoparticles and grains
US-2022080500-A1 · Mar 17, 2022 · US
Iron nitride magnetic material including coated nanoparticles
US-2022051835-A1 · Feb 17, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F1/065?
- CPC H01F1/065 is the Cooperative Patent Classification code for “obtained by a reduction.”
- How many patents are filed under CPC H01F1/065 (obtained by a reduction)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC H01F1/065 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).