Cements for oil and gas cementing applications
US-2021403792-A1 · Dec 30, 2021 · US
Iron oxide
Iron oxide · 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 | C04B14/308 |
| Official title | {Iron oxide} |
| Display label | Iron oxide |
| Total patents | 91 |
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 | 7 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 13 |
| 2020 | 16 |
| 2021 | 11 |
| 2022 | 9 |
| 2023 | 11 |
| 2024 | 5 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compositions and methods for well cementing
US-11130899-B2 · Sep 28, 2021 · US
Process for hydrophobizing shaped insulation-material bodies based on silica at ambient pressure
US-2021292238-A1 · Sep 23, 2021 · US
Porous molded body in the form of an insulating plaster layer or an insulating panel
US-11059755-B2 · Jul 13, 2021 · US
Weighted composition for treatment of a subterranean formation
US-11034873-B2 · Jun 15, 2021 · US
Components and systems to manage thermal runaway issues in electric vehicle batteries
US-2021167438-A1 · Jun 3, 2021 · US
Capsule design for the capture of reagents
US-10995254-B2 · May 4, 2021 · US
Wellbore isolation barrier including negative thermal expansion material
US-10975658-B2 · Apr 13, 2021 · US
Performance grade asphalt repair composition
US-10954161-B2 · Mar 23, 2021 · US
Method for manufacturing briquettes containing a calcium-magnesium compound and an iron-based compound, and briquettes thus obtained
US-10947157-B2 · Mar 16, 2021 · US
Thermally treated briquettes containing a “quick” calcium-magnesium compound and calcium ferrites, and method of manufacture thereof
US-10851017-B2 · Dec 1, 2020 · US
Aerated composite materials, methods of production and uses thereof
US-10851022-B2 · Dec 1, 2020 · US
Wellbore isolation barrier including negative thermal expansion material
US-2020362662-A1 · Nov 19, 2020 · US
Magnetorheological fluids and methods of using same
US-10836949-B2 · Nov 17, 2020 · US
Magnetizable concrete composite for road-embedded wireless power transfer
US-10770932-B2 · Sep 8, 2020 · US
Capsule design for the capture of reagents
US-10723932-B2 · Jul 28, 2020 · US
Capsule design for the capture of reagents
US-10723933-B2 · Jul 28, 2020 · US
Composition in the form of briquettes comprising burnt calcium-magnesium compounds, method for obtaining same, and use thereof
US-10718034-B2 · Jul 21, 2020 · US
Fixing systems having fine-particle fillers
US-10711116-B2 · Jul 14, 2020 · US
Magnetic floor surface
US-10699828-B2 · Jun 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B14/308?
- CPC C04B14/308 is the Cooperative Patent Classification code for “Iron oxide.”
- How many patents are filed under CPC C04B14/308 (Iron oxide)?
- Our database includes 91 publications tagged with this CPC code.
- Is patent activity under CPC C04B14/308 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).