Quantum dot light emitting device comprising three sub-function layers with different surface energy of ligands, preparation method thereof and display apparatus
US-12527158-B2 · Jan 13, 2026 · US
containing iron, cobalt or nickel
containing iron, cobalt or nickel · 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 | C09K11/60 |
| Official title | containing iron, cobalt or nickel |
| Display label | containing iron, cobalt or nickel |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composite film, preparation method thereof and light-emitting device
US-2025212594-A1 · Jun 26, 2025 · US
Metal oxide nanoparticles and preparation method thereof, quantum dot light-emitting diode
US-12305099-B2 · May 20, 2025 · US
Solventless quantum dot composition, method for producing same, and cured film, color filter, and display device comprising same
US-12173210-B2 · Dec 24, 2024 · US
Quantum dot material, light-emitting device, display apparatus, and manufacturing method
US-2024357848-A1 · Oct 24, 2024 · US
Solventless quantum dot composition, method for producing same, and cured film, color filter, and display device comprising same
US-2024287382-A1 · Aug 29, 2024 · US
Fluorescent compositions
US-11680202-B2 · Jun 20, 2023 · US
Display apparatus
US-2023005994-A1 · Jan 5, 2023 · US
Nitride fluorescent material and light-emitting device containing same
US-11518935-B2 · Dec 6, 2022 · US
Metal oxide nanoparticles and preparation method thereof, quantum dot light-emitting diode
US-2022267671-A1 · Aug 25, 2022 · US
Photoluminescent iron-doped barium stannate material, security ink composition and security feature thereof
US-11352517-B2 · Jun 7, 2022 · US
Quantum dot light emitting device, preparation method thereof and display apparatus
US-2022098479-A1 · Mar 31, 2022 · US
Fluorescent compositions
US-2021348054-A1 · Nov 11, 2021 · US
Fluorescent compositions
US-11084978-B2 · Aug 10, 2021 · US
Nitride fluorescent material and light-emitting device containing same
US-2021139775-A1 · May 13, 2021 · US
Semiconductor quantum dot and method of carrying out chemical reaction or photoluminescence reaction by using the same
US-10981139-B2 · Apr 20, 2021 · US
Photoluminescent iron-doped barium stannate material, security ink composition and security feature thereof
US-2020095445-A1 · Mar 26, 2020 · US
Fluorescent compositions
US-10538701-B1 · Jan 21, 2020 · US
Semiconductor quantum dot and method of carrying out chemical reaction or photoluminescence reaction by using the same
US-2020009526-A1 · Jan 9, 2020 · US
Inorganic emitting particle, inorganic emitting particle film, and LED package and display device including the same
US-10431712-B2 · Oct 1, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K11/60?
- CPC C09K11/60 is the Cooperative Patent Classification code for “containing iron, cobalt or nickel.”
- How many patents are filed under CPC C09K11/60 (containing iron, cobalt or nickel)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC C09K11/60 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).