Ferrite particles, carrier for electrophotographic developer, electrophotographic developer, and ferrite particle production method
US-2024254004-A1 · Aug 1, 2024 · 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 | C01P2004/52 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 362 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 38 |
| 2016 | 42 |
| 2017 | 34 |
| 2018 | 26 |
| 2019 | 45 |
| 2020 | 24 |
| 2021 | 28 |
| 2022 | 39 |
| 2023 | 26 |
| 2024 | 25 |
| 2025 | 29 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low-temperature route for precision synthesis of metal oxide nanoparticles
US-9517945-B2 · Dec 13, 2016 · US
Dry, surface-modified nanocalcite
US-9512264-B2 · Dec 6, 2016 · US
Method of synthesizing nanoparticles and a nanoparticle-polymer composite using a plant extract
US-9491947-B1 · Nov 15, 2016 · US
Method for producing size selected particles
US-9446967-B2 · Sep 20, 2016 · US
Process for improving the particle size distribution of a calcium carbonate-containing material
US-2016264785-A1 · Sep 15, 2016 · US
Perovskite oxide containing hydride ion, and method for manufacturing same
US-9440228-B2 · Sep 13, 2016 · US
Process for preparing scalenohedral precipitated calcium carbonate
US-9428398-B2 · Aug 30, 2016 · US
Precipitated calcium carbonate from pulp mill waste having an improved brightness, method for the production and use thereof
US-9409788-B2 · Aug 9, 2016 · US
Chemical Mechanical Polishing (CMP) Composition for Shallow Trench Isolation (STI) Applications and Methods of Making Thereof
US-2016177134-A1 · Jun 23, 2016 · US
Visible light responsive doped titania photocatalytic nanoparticles and process for their synthesis
US-9352302-B2 · May 31, 2016 · US
Ultrafine zinc oxide particle dispersion solution, method for producing the ultrafine zinc oxide particle dispersion solution, and zinc oxide thin film
US-9352975-B2 · May 31, 2016 · US
Method for making highly porous, stable metal oxides with a controlled pore structure
US-9334173-B2 · May 10, 2016 · US
Carbon black polymeric filler useful for printing applications
US-2016122549-A1 · May 5, 2016 · US
Method for preparing rare earth fluoride nanoparticles
US-9327993-B2 · May 3, 2016 · US
Morphologically and size uniform monodisperse particles and their shape-directed self-assembly
US-2016108313-A1 · Apr 21, 2016 · US
Cathode Material for Lithium-Ion Rechargeable Batteries
US-2016099469-A1 · Apr 7, 2016 · US
Chemical mechanical polishing (CMP) composition for shallow trench isolation (STI) applications and methods of making thereof
US-9305476-B2 · Apr 5, 2016 · US
Porous metal oxide particles, production method thereof and application thereof
US-2016089334-A1 · Mar 31, 2016 · US
Cathode synthesized by flux method and battery comprising same
US-2016043394-A1 · Feb 11, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01P2004/52?
- CPC C01P2004/52 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01P2004/52 (Chemistry & Metallurgy)?
- Our database includes 362 publications tagged with this CPC code.
- Is patent activity under CPC C01P2004/52 growing?
- Publication counts under this code: 25 in 2024 vs 29 in 2025 (latest complete years).