Ferroelectric smectic liquid crystalline medium
US-2025320408-A1 · Oct 16, 2025 · US
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Pyrazine
Pyrazine · 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 | C09K19/3452 |
| Official title | {Pyrazine} |
| Display label | Pyrazine |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Heteroaromatic isothiocyanates
US-12359128-B2 · Jul 15, 2025 · US
Heteroaromatic isothiocyanates
US-2024124779-A1 · Apr 18, 2024 · US
Dichroic dye composition
US-11939512-B2 · Mar 26, 2024 · US
Polymerizable liquid crystal compound, liquid crystal composition for optical element, polymer, optically anisotropic body, and optical element for display device
US-11674082-B2 · Jun 13, 2023 · US
Dichroic dye composition
US-2023053362-A1 · Feb 23, 2023 · US
Optically anisotropic layer, optical film, polarizing plate, and image display device
US-2022267675-A1 · Aug 25, 2022 · US
Polymerizable Liquid Crystal Compound, Liquid Crystal Composition for Optical Element, Polymer, Optically Anisotropic Body, and Optical Element for Display Device
US-2021062092-A1 · Mar 4, 2021 · US
Light-emitting device using organometallic complex having a pyrazine skeleton
US-10764974-B2 · Sep 1, 2020 · US
Polymerizable liquid crystal compound, composition, liquid crystal polymerization film-kind thereof and use thereof
US-10581022-B2 · Mar 3, 2020 · US
Light-Emitting Device
US-2019053351-A1 · Feb 14, 2019 · US
Light-emitting device using organometallic complex
US-10129947-B2 · Nov 13, 2018 · US
Polymerizable compound, polymerizable composition, polymer, and optically anisotropic material
US-9856333-B2 · Jan 2, 2018 · US
Alignment layer and liquid crystal display having the same
US-9732276-B2 · Aug 15, 2017 · US
Polymerizable liquid crystal compound, composition, liquid crystal polymerization film-kind thereof and use thereof
US-2017174992-A1 · Jun 22, 2017 · US
Polymerizable compound, polymerizable composition, polymer, and optically anisotropic material
US-2017044279-A1 · Feb 16, 2017 · US
Polymerizable compound, polymerizable composition, polymer, and optically anisotropic material
US-9512251-B2 · Dec 6, 2016 · US
Optical switch element comprising a liquid-crystalline medium
US-9416314-B2 · Aug 16, 2016 · US
Switch element comprising a liquid-crystalline medium
US-9371483-B2 · Jun 21, 2016 · US
Polymerizable compound, polymerizable composition, polymer, and optically anisotropic material
US-2015183902-A1 · Jul 2, 2015 · US