Liquid-crystalline medium
US-12552991-B2 · Feb 17, 2026 · US
the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms
the heterocyclic ring being a six-membered aromatic ring containing 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 | C09K19/345 |
| Official title | {the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms} |
| Display label | the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compound and liquid crystal composition
US-12480049-B2 · Nov 25, 2025 · US
Liquid-crystalline medium
US-2024368471-A1 · Nov 7, 2024 · US
Liquid crystal composition and element used for phase control of electromagnetic wave signal
US-12060514-B2 · Aug 13, 2024 · US
Liquid-crystalline medium
US-12043781-B2 · Jul 23, 2024 · US
Liquid-crystal medium
US-11781069-B2 · Oct 10, 2023 · US
Compound and liquid crystal composition
US-2023250338-A1 · Aug 10, 2023 · US
Liquid-crystalline medium
US-2022372371-A1 · Nov 24, 2022 · US
Liquid crystal composition and element used for phase control of electromagnetic wave signal
US-2022119710-A1 · Apr 21, 2022 · US
Copolymer for liquid crystal alignment agent, liquid crystal alignment agent including the same, and liquid crystal alignment film and liquid crystal display device using the same
US-11136506-B2 · Oct 5, 2021 · US
Liquid-crystalline medium and liquid-crystal display comprising the same
US-11060029-B2 · Jul 13, 2021 · US
Liquid crystal displays and liquid crystalline media with homeotropic alignment
US-11015121-B2 · May 25, 2021 · US
Liquid-crystalline medium and liquid-crystal display
US-10738243-B2 · Aug 11, 2020 · US
Copolymer for liquid crystal alignment agent, liquid crystal alignment agent including the same, and liquid crystal alignment film and liquid crystal display device using the same
US-2020165521-A1 · May 28, 2020 · US
Polymerizable polar compound, liquid crystal composition and liquid crystal display device
US-10662379-B2 · May 26, 2020 · US
Polymerizable liquid crystal compound, composition, liquid crystal polymerization film-kind thereof and use thereof
US-10581022-B2 · Mar 3, 2020 · US
Liquid-crystalline medium and liquid-crystal display
US-2019338187-A1 · Nov 7, 2019 · US
Liquid crystal displays and liquid crystalline media with homeotropic alignment
US-2019256771-A1 · Aug 22, 2019 · US
Liquid-crystal medium
US-2019185748-A1 · Jun 20, 2019 · US
Liquid crystal displays and liquid crystalline media with homeotropic alignment
US-10273409-B2 · Apr 30, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K19/345?
- CPC C09K19/345 is the Cooperative Patent Classification code for “the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms.”
- How many patents are filed under CPC C09K19/345 (the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC C09K19/345 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).