Magnetic core and coil component using same
US-2016336104-A1 · Nov 17, 2016 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C22C33/02 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 700 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 49 |
| 2016 | 59 |
| 2017 | 60 |
| 2018 | 72 |
| 2019 | 74 |
| 2020 | 72 |
| 2021 | 83 |
| 2022 | 59 |
| 2023 | 53 |
| 2024 | 73 |
| 2025 | 32 |
| 2026 | 14 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Precipitation-Hardening Stainless Steel Powder and Sintered Compact Thereof
US-2016333450-A1 · Nov 17, 2016 · US
R-fe-b sintered magnet and making method
US-2016293303-A1 · Oct 6, 2016 · US
Method for storing oxygen absorbing agent
US-2016250617-A1 · Sep 1, 2016 · US
Magnetic material sputtering target and method for producing same
US-2016237552-A1 · Aug 18, 2016 · US
Valve seat
US-2016201527-A1 · Jul 14, 2016 · US
R-t-b based sintered magnet
US-2016189838-A1 · Jun 30, 2016 · US
Permanent magnet, motor, and generator
US-2016155548-A1 · Jun 2, 2016 · US
Method for oxide dispersion strengthening of metallic material using laser
US-9346125-B2 · May 24, 2016 · US
Method for producing powder for magnet
US-2016108502-A1 · Apr 21, 2016 · US
Corrosion resistant article and methods of making
US-2016017464-A1 · Jan 21, 2016 · US
Highly wear-resistant valve seat for use in internal combustion engine and manufacturing method therefor
US-2015369090-A1 · Dec 24, 2015 · US
Iron powder for dust core and insulation-coated iron powder for dust core
US-2015371746-A1 · Dec 24, 2015 · US
Sintered magnet production method
US-2015364251-A1 · Dec 17, 2015 · US
Endplate for hot isostatic pressing canister, hot isostatic pressing canister, and hot isostatic pressing method
US-2015360290-A1 · Dec 17, 2015 · US
Binder for powder metallurgy, mixed powder for powder metallurgy, and sintered body
US-2015361255-A1 · Dec 17, 2015 · US
Erosion resistant hard composite materials
US-2015354283-A1 · Dec 10, 2015 · US
Method for manufacturing powder magnetic core, powder magnetic core, and coil component
US-2015332850-A1 · Nov 19, 2015 · US
Sintered rare earth magnet, method of producing the same, and rotating machine
US-9177705-B2 · Nov 3, 2015 · US
Method of manufacturing iron-based powder
US-9156090-B2 · Oct 13, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22C33/02?
- CPC C22C33/02 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C22C33/02 (Chemistry & Metallurgy)?
- Our database includes 700 publications tagged with this CPC code.
- Is patent activity under CPC C22C33/02 growing?
- Publication counts under this code: 73 in 2024 vs 32 in 2025 (latest complete years).