Phosphor, method of producing phosphor, light-emitting element, light-emitting device, and image display apparatus
US-12256579-B2 · Mar 18, 2025 · US
with alkali or alkaline earth metals
with alkali or alkaline earth metals · 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 | C09K11/645 |
| Official title | {with alkali or alkaline earth metals} |
| Display label | with alkali or alkaline earth metals |
| Total patents | 26 |
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 | 4 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Optical member, composite optical member, and lighting device
US-12204128-B2 · Jan 21, 2025 · US
Fluoride fluorescent body, method for producing same, and light emission apparatus
US-2024279543-A1 · Aug 22, 2024 · US
Optical member, composite optical member, and lighting device
US-2023228930-A1 · Jul 20, 2023 · US
Phosphor, method of producing phosphor, light-emitting element, light-emitting device, and image display apparatus
US-2022367760-A1 · Nov 17, 2022 · US
Method for producing fluorescent material, and fluorescent material
US-11078414-B2 · Aug 3, 2021 · US
Display device and head-mounted display
US-11048092-B2 · Jun 29, 2021 · US
Infrared emitting device
US-10971658-B2 · Apr 6, 2021 · US
Display device and head-mounted display
US-2021096374-A1 · Apr 1, 2021 · US
Process for improved halide materials
US-10954438-B2 · Mar 23, 2021 · US
Synthetic material for detecting ultraviolet radiation and/or X-radiation
US-10941340-B2 · Mar 9, 2021 · US
Light-emitting instrument and image display device
US-10818824-B2 · Oct 27, 2020 · US
Display device and head-mounted display
US-10775627-B2 · Sep 15, 2020 · US
Infrared emitting device
US-2020220053-A1 · Jul 9, 2020 · US
Synthetic material for detecting ultraviolet radiation and/or x-radiation
US-2020109332-A1 · Apr 9, 2020 · US
Display device and head-mounted display
US-2020089000-A1 · Mar 19, 2020 · US
Method for producing fluorescent material, and fluorescent material
US-2019300785-A1 · Oct 3, 2019 · US
Process for improved halide materials
US-2018155618-A1 · Jun 7, 2018 · US
Light-emitting instrument and image display device
US-2018127647-A1 · May 10, 2018 · US
Light emitting diode device with luminescent material
US-9944849-B2 · Apr 17, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K11/645?
- CPC C09K11/645 is the Cooperative Patent Classification code for “with alkali or alkaline earth metals.”
- How many patents are filed under CPC C09K11/645 (with alkali or alkaline earth metals)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC C09K11/645 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).