Silicon oxide-coated iron oxide composition for coating comprising iron oxide particles coated with silicon oxide
US-2017333300-A1 · Nov 23, 2017 · US
Oxides of iron
Oxides of iron · 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 | C09C1/24 |
| Official title | Oxides of iron |
| Display label | Oxides of iron |
| Total patents | 258 |
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 | 27 |
| 2016 | 25 |
| 2017 | 27 |
| 2018 | 29 |
| 2019 | 34 |
| 2020 | 24 |
| 2021 | 33 |
| 2022 | 24 |
| 2023 | 15 |
| 2024 | 12 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electromagnetic wave absorber and film forming paste
US-9806427-B2 · Oct 31, 2017 · US
Red iron-oxide pigments with improved colour values
US-2017253745-A1 · Sep 7, 2017 · US
Composite oxide black pigment and method for producing same
US-9732230-B2 · Aug 15, 2017 · US
Method for fabrication of a hybrid dual phase filler for elastomers
US-2017218205-A1 · Aug 3, 2017 · US
Electrophoretic dispersion
US-9670367-B2 · Jun 6, 2017 · US
Particles for electrophoretic displays
US-9651846-B2 · May 16, 2017 · US
Particles for electrophoretic displays
US-9645416-B2 · May 9, 2017 · US
Functional material, its preparation method, color filter material, and color filter substrate
US-2016369164-A1 · Dec 22, 2016 · US
Cosmetic composition comprising an ordered macroporous material
US-2016361239-A1 · Dec 15, 2016 · US
Novel ordered macroporous materials
US-2016361248-A1 · Dec 15, 2016 · US
Nanoparticle Powder Composition and Method of Making the Same
US-2016340512-A1 · Nov 24, 2016 · US
Silicon comprising polymer coated particles
US-2016339446-A1 · Nov 24, 2016 · US
Processes for producing effects layers
US-2016325310-A1 · Nov 10, 2016 · US
Method of forming microsphere having structural color
US-9457333-B2 · Oct 4, 2016 · US
Functional material, its preparation method, alignment material, and liquid crystal display substrate
US-2016280998-A1 · Sep 29, 2016 · US
Production of red iron oxide pigment
US-2016272836-A1 · Sep 22, 2016 · US
Magnetic iron oxide particles, magnetic carrier for electrophotographic developers and process for producing the same, and two-component system developer
US-9448500-B2 · Sep 20, 2016 · US
Method for producing finely divided haematite and for producing iron oxide red pigments
US-9428402-B2 · Aug 30, 2016 · US
Melanin Binding Agents for Targeted Topical Delivery
US-2016235642-A1 · Aug 18, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09C1/24?
- CPC C09C1/24 is the Cooperative Patent Classification code for “Oxides of iron.”
- How many patents are filed under CPC C09C1/24 (Oxides of iron)?
- Our database includes 258 publications tagged with this CPC code.
- Is patent activity under CPC C09C1/24 growing?
- Publication counts under this code: 12 in 2024 vs 5 in 2025 (latest complete years).