Display device including a touch insulation layer and a reflection adjustment layer, electronic device, and method for manufacturing a display device
US-2026033220-A1 · Jan 29, 2026 · US
containing at least two nitrogen atoms
containing at least two nitrogen atoms · 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 | C09K19/348 |
| Official title | {containing at least two nitrogen atoms} |
| Display label | containing at least two nitrogen atoms |
| Total patents | 56 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 13 |
| 2017 | 13 |
| 2018 | 7 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Liquid-Crystal Medium Comprising Polymerizable Compounds
US-2025368897-A1 · Dec 4, 2025 · US
Liquid-crystalline medium
US-2025250486-A1 · Aug 7, 2025 · US
Organic solid crystals having helical structures formed using cholesteric liquid crystals
US-12282222-B1 · Apr 22, 2025 · US
Polymerisable liquid crystal material and polymerised liquid crystal film
US-12187946-B2 · Jan 7, 2025 · US
Photoresponsive high-molecular weight material, adhesive, toner, and image forming method
US-12037531-B2 · Jul 16, 2024 · US
Organic solid crystals having helical structures formed using cholesteric liquid crystals
US-11796856-B1 · Oct 24, 2023 · US
Main-chain liquid crystalline hydrogels for cell culture
US-11732238-B2 · Aug 22, 2023 · US
Coating-type polarizing film using diacetylene-based lyotropic liquid crystal mixture containing iodines, and manufacturing method therefor
US-11725145-B2 · Aug 15, 2023 · US
Polymerisable Liquid Crystal Material and Polymerised Liquid Crystal Film
US-2022162504-A1 · May 26, 2022 · US
Polymerisable liquid crystal material and polymerised liquid crystal film
US-2022145180-A1 · May 12, 2022 · US
Polymerizable compound and optically anisotropic object
US-11261378-B2 · Mar 1, 2022 · US
Coating-type polarizing film using diacetylene-based lyotropic liquid crystal mixture containing iodines, and manufacturing method therefor
US-2021395612-A1 · Dec 23, 2021 · US
Main-chain liquid crystalline hydrogels for cell culture
US-2021348122-A1 · Nov 11, 2021 · US
Optically anisotropic layer, method for producing the optically anisotropic layer, a laminate, polarizing plate, display device, liquid crystal compound, method for producing the liquid crystal compound, and carboxylic acid compound
US-11072741-B2 · Jul 27, 2021 · US
Photoresponsive high-molecular weight material, adhesive, toner, and image forming method
US-2020263088-A1 · Aug 20, 2020 · US
Ultraviolet light absorbers
US-10619098-B2 · Apr 14, 2020 · US
Liquid crystal display device
US-10539831-B2 · Jan 21, 2020 · US
Optically anisotropic layer, method for producing the optically anisotropic layer, a laminate, polarizing plate, display device, liquid crystal compound, method for producing the liquid crystal compound, and carboxylic acid compound
US-2018346814-A1 · Dec 6, 2018 · US
Optically anisotropic layer, method for producing the optically anisotropic layer, a laminate, polarizing plate, display device, liquid crystal compound, method for producing the liquid crystal compound, and carboxylic acid compound
US-10059877-B2 · Aug 28, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K19/348?
- CPC C09K19/348 is the Cooperative Patent Classification code for “containing at least two nitrogen atoms.”
- How many patents are filed under CPC C09K19/348 (containing at least two nitrogen atoms)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC C09K19/348 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).