Liquid crystal compound having difluoromethyleneoxy, liquid crystal composition and liquid crystal display device
US-2015376502-A1 · Dec 31, 2015 · US
linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers}
linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers} · 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 | C09K19/20 |
| Official title | linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers} |
| Display label | linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers} |
| Total patents | 616 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 78 |
| 2016 | 105 |
| 2017 | 79 |
| 2018 | 92 |
| 2019 | 83 |
| 2020 | 68 |
| 2021 | 27 |
| 2022 | 22 |
| 2023 | 13 |
| 2024 | 19 |
| 2025 | 24 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Liquid crystal composition and liquid crystal display device using same
US-2015376501-A1 · Dec 31, 2015 · US
Liquid crystal compound, liquid crystal composition and liquid crystal display device
US-2015376504-A1 · Dec 31, 2015 · US
Liquid crystalline medium and liquid crystalline display
US-9212309-B2 · Dec 15, 2015 · US
Liquid crystal compound and methods for the preparation thereof
US-9206354-B1 · Dec 8, 2015 · US
Liquid crystal display device
US-2015344778-A1 · Dec 3, 2015 · US
Compound having four polymerizable groups, liquid crystal composition and liquid crystal display device
US-2015344784-A1 · Dec 3, 2015 · US
Liquid Crystal Compound, Liquid Crystal Composition and Methods for Preparing the Same, Liquid Crystal Display Panel
US-2015344780-A1 · Dec 3, 2015 · US
Liquid crystal compound and methods for the preparation thereof
US-2015337201-A1 · Nov 26, 2015 · US
Liquid crystal compound, liquid crystal composition and methods for preparing the same, liquid crystal display panel
US-9193910-B1 · Nov 24, 2015 · US
Liquid crystal composition and liquid crystal display device
US-2015329780-A1 · Nov 19, 2015 · US
Liquid crystalline medium and liquid crystal display
US-2015329782-A1 · Nov 19, 2015 · US
Liquid crystal composition and liquid crystal display device
US-9181483-B2 · Nov 10, 2015 · US
Nematic liquid crystal composition and liquid crystal display device
US-2015315468-A1 · Nov 5, 2015 · US
Optically isotropic liquid crystal medium and optical device
US-9175222-B2 · Nov 3, 2015 · US
Liquid crystal composition and liquid crystal display device
US-2015299573-A1 · Oct 22, 2015 · US
Octahydro binaphthyl-based chiral compound-containing liquid-crystal composition and optical element
US-2015291548-A1 · Oct 15, 2015 · US
Compound having four polymerizable groups, liquid crystal composition and liquid crystal display device
US-9157027-B2 · Oct 13, 2015 · US
Liquid-crystalline medium
US-2015275088-A1 · Oct 1, 2015 · US
Cycloheptane derivative and preparation method and use thereof
US-2015252261-A1 · Sep 10, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K19/20?
- CPC C09K19/20 is the Cooperative Patent Classification code for “linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers}.”
- How many patents are filed under CPC C09K19/20 (linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers})?
- Our database includes 616 publications tagged with this CPC code.
- Is patent activity under CPC C09K19/20 growing?
- Publication counts under this code: 19 in 2024 vs 24 in 2025 (latest complete years).