Magnetic polishing slurry and method for polishing a workpiece
US-12545810-B2 · Feb 10, 2026 · US
with a protective layer
with a protective layer · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F1/0552 |
| Official title | {with a protective layer} |
| Display label | with a protective layer |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 3 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Iron-based nanoparticles and grains
US-12512238-B2 · Dec 30, 2025 · US
Production method of rare earth magnet
US-12460278-B2 · Nov 4, 2025 · US
Method of producing magnetic powder, magnetic material for magnetic field amplification, and magnetic material for hyper-high frequency absorption
US-2025014791-A1 · Jan 9, 2025 · US
METHOD OF PRODUCING PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER
US-2024112838-A1 · Apr 4, 2024 · US
Method of producing rare earth magnetic powder and rare earth magnetic powder
US-2024062936-A1 · Feb 22, 2024 · US
Iron-based nanoparticles and grains
US-2024055165-A1 · Feb 15, 2024 · US
PRODUCTION METHOD FOR PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER AND PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER
US-2024006101-A1 · Jan 4, 2024 · US
PRODUCTION METHOD FOR PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER, AND BONDED MAGNET
US-2023415227-A1 · Dec 28, 2023 · US
Iron-based nanoparticles and grains
US-11837393-B2 · Dec 5, 2023 · US
Magnetic powder
US-11710586-B2 · Jul 25, 2023 · US
Magnetic powder and preparation method thereof
US-2022351882-A1 · Nov 3, 2022 · US
Rare earth magnet and production method thereof
US-11476020-B2 · Oct 18, 2022 · US
Magnetic powder and preparation method thereof
US-11424055-B2 · Aug 23, 2022 · US
Programmable soft materials containing ferromagnetic domains and methods of making
US-11364658-B2 · Jun 21, 2022 · US
Iron-based nanoparticles and grains
US-2022080500-A1 · Mar 17, 2022 · US
Magnetic polishing slurry and method for polishing a workpiece
US-2021348027-A1 · Nov 11, 2021 · US
Iron-based nanoparticles and grains
US-11161175-B2 · Nov 2, 2021 · US
Production method of rare earth magnet
US-2021272751-A1 · Sep 2, 2021 · US
Programmable soft materials containing ferromagnetic domains and methods of making
US-2020223099-A1 · Jul 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F1/0552?
- CPC H01F1/0552 is the Cooperative Patent Classification code for “with a protective layer.”
- How many patents are filed under CPC H01F1/0552 (with a protective layer)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC H01F1/0552 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).