Mesogen compounds
US-12492343-B2 · Dec 9, 2025 · US
Polysiloxanes
Polysiloxanes · 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 | C09K19/408 |
| Official title | {Polysiloxanes} |
| Display label | Polysiloxanes |
| Total patents | 47 |
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 | 7 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Anisotropic light absorption film and laminate
US-12085742-B2 · Sep 10, 2024 · US
Dielectric copolymer materials
US-11999893-B2 · Jun 4, 2024 · US
Liquid crystal emulsification method and liquid crystal emulsion
US-11884865-B2 · Jan 30, 2024 · US
Liquid Crystalline Polymer Composition having a Low Dielectric Constant
US-2023407181-A1 · Dec 21, 2023 · US
Electro-responsive ionic liquid crystal elastomer
US-11814562-B2 · Nov 14, 2023 · US
Mesogen Compounds
US-2023295514-A1 · Sep 21, 2023 · US
Siloxane-based liquid crystalline elastomers with dynamic covalent bonds
US-2023242714-A1 · Aug 3, 2023 · US
Actuator comprising an innervated liquid crystal elastomer
US-2023049026-A1 · Feb 16, 2023 · US
Liquid crystal emulsification method and liquid crystal emulsion
US-2022403246-A1 · Dec 22, 2022 · US
Display substrate having wavelength-actuatable color filter, display apparatus having the same, and method of operating display apparatus
US-11499056-B2 · Nov 15, 2022 · US
Self-aligning material, self-aligning liquid crystal material, and liquid crystal display panel
US-11434427-B2 · Sep 6, 2022 · US
Laminate, manufacturing method of laminate, and image display device
US-11286423-B2 · Mar 29, 2022 · US
Dielectric copolymer materials
US-2021355383-A1 · Nov 18, 2021 · US
Self-aligning material, self-aligning liquid crystal material, and liquid crystal display panel
US-2021324273-A1 · Oct 21, 2021 · US
Electro-responsive ionic liquid crystal elastomer
US-2021214613-A1 · Jul 15, 2021 · US
Display substrate having wavelength-actuatable color filter, display apparatus having the same, and method of operating display apparatus
US-2021200022-A1 · Jul 1, 2021 · US
Non-linear side chain liquid crystal polyorganosiloxanes and methods for their preparation and use in electro-optic applications and devices
US-11001758-B2 · May 11, 2021 · US
Liquid crystal compound and use thereof
US-10954444-B2 · Mar 23, 2021 · US
Liquid crystal element and method of producing the same
US-10948780-B2 · Mar 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K19/408?
- CPC C09K19/408 is the Cooperative Patent Classification code for “Polysiloxanes.”
- How many patents are filed under CPC C09K19/408 (Polysiloxanes)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC C09K19/408 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).