Oxide fluorescent material and light emitting device
US-12557447-B2 · Feb 17, 2026 · US
Chalcogenides
Chalcogenides · 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 | C09K11/681 |
| Official title | {Chalcogenides} |
| Display label | Chalcogenides |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 4 |
| 2018 | 6 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Phosphor, light source using same, biochemical analysis device, and method for producing phosphor
US-12545837-B2 · Feb 10, 2026 · US
Luminophore, method for producing a luminophore and radiation-emitting component
US-12503647-B2 · Dec 23, 2025 · US
Liquid-phase alloy catalyst, method of manufacturing same and two-dimensional chalcogenide thin film comprising thermodynamically induced grain boundary in monolayer crystal using same
US-2025312780-A1 · Oct 9, 2025 · US
Oxide phosphor, light emitting device, and method for producing oxide phosphor
US-2025275312-A1 · Aug 28, 2025 · US
Composite film, preparation method thereof and light-emitting device
US-2025212594-A1 · Jun 26, 2025 · US
Led light source for medical optical coherence tomography with high axial resolution
US-2025063864-A1 · Feb 20, 2025 · US
Oxide fluorescent material and light emitting device using the same
US-2024400896-A1 · Dec 5, 2024 · US
Manganese-doped red luminescent material and conversion LED
US-12152185-B2 · Nov 26, 2024 · US
Color stable mn - activated oxidofluorides as conversion luminescent materials for led-based solid state light sources
US-2024336838-A1 · Oct 10, 2024 · US
Light-emitting device, and electronic device and inspection method using same
US-12100927-B2 · Sep 24, 2024 · US
Color stable Mn-activated oxidofluorides as conversion luminescent materials for LED-based solid state light sources
US-12018194-B2 · Jun 25, 2024 · US
Template-assisted synthesis of 2D nanosheets using nanoparticle templates
US-11964879-B2 · Apr 23, 2024 · US
Red light and near-infrared light-emitting material, preparation method thereof and light-emitting device
US-11932790-B2 · Mar 19, 2024 · US
Quantum dots containing molybdenum, nickel, and sulfur and method for manufacturing same
US-11912917-B2 · Feb 27, 2024 · US
Light source with photoluminescence emitter
US-11860521-B2 · Jan 2, 2024 · US
Phosphor, light source using same, biochemical analysis device, and method for producing phosphor
US-2023374377-A1 · Nov 23, 2023 · US
NOVEL Mn(VI) - ACTIVATED OXIDOFLUORIDES AS LUMINESCENT MATERIALS FOR SOLID STATE LIGHT SOURCES
US-2023279292-A1 · Sep 7, 2023 · US
Thermoluminescent composite particle and marking comprising same
US-11719644-B2 · Aug 8, 2023 · US
Red light and near-infrared light-emitting material and light-emitting device
US-11718788-B2 · Aug 8, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K11/681?
- CPC C09K11/681 is the Cooperative Patent Classification code for “Chalcogenides.”
- How many patents are filed under CPC C09K11/681 (Chalcogenides)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC C09K11/681 growing?
- Publication counts under this code: 9 in 2024 vs 5 in 2025 (latest complete years).