Optical switching device
US-2017371186-A1 · Dec 28, 2017 · US
Heterocyclic compounds
Heterocyclic compounds · 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 | C09K19/588 |
| Official title | {Heterocyclic compounds} |
| Display label | Heterocyclic compounds |
| Total patents | 172 |
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 | 27 |
| 2016 | 22 |
| 2017 | 38 |
| 2018 | 20 |
| 2019 | 13 |
| 2020 | 15 |
| 2021 | 6 |
| 2022 | 11 |
| 2023 | 12 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Bimesogenic compounds and mesogenic media
US-2017369784-A1 · Dec 28, 2017 · US
Bimesogenic compounds and mesogenic media
US-2017342324-A1 · Nov 30, 2017 · US
Liquid crystalline medium and liquid crystal display
US-9822307-B2 · Nov 21, 2017 · US
Bimesogenic compounds and mesogenic media
US-2017327741-A1 · Nov 16, 2017 · US
Polymerisable mesogenic compound, liquid crystal medium and liquid crystal display
US-2017226422-A1 · Aug 10, 2017 · US
Dioxolane derivative, liquid crystal composition, liquid crystal element, and liquid crystal display device
US-9708285-B2 · Jul 18, 2017 · US
Liquid crystal medium, optical device and liquid crystal compound
US-9611429-B2 · Apr 4, 2017 · US
Liquid-crystalline medium and liquid-crystal display
US-2017002269-A1 · Jan 5, 2017 · US
Bimesogenic compounds and mesogenic media
US-2017002268-A1 · Jan 5, 2017 · US
Cholesteric liquid crystal mixture, film, IR reflection plate, laminate, and laminated glass
US-9534727-B2 · Jan 3, 2017 · US
Compound, haze-lowering agent, liquid crystal composition, polymer material, and film
US-9481829-B2 · Nov 1, 2016 · US
Liquid crystal medium, optical device and liquid crystal compound
US-2016304784-A1 · Oct 20, 2016 · US
Mesogenic media and liquid crystal display
US-2016298031-A1 · Oct 13, 2016 · US
Octahydro binaphthyl-based chiral compound-containing liquid-crystal composition and optical element
US-9458125-B2 · Oct 4, 2016 · US
Chiral dopant and identification and authentication using polymeric liquid crystal material markings
US-2016264591-A1 · Sep 15, 2016 · US
Rotogravure printing processes for producing optically variable security features
US-2016263931-A1 · Sep 15, 2016 · US
Salt-free composite marking based on chiral liquid crystal precursors comprising chiral acrylate dopants
US-2016264792-A1 · Sep 15, 2016 · US
Isosorbide derivative, liquid crystal composition, liquid crystal element, and liquid crystal display device
US-9441164-B2 · Sep 13, 2016 · US
Method of preparing a birefringent polymer film
US-2016244671-A1 · Aug 25, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K19/588?
- CPC C09K19/588 is the Cooperative Patent Classification code for “Heterocyclic compounds.”
- How many patents are filed under CPC C09K19/588 (Heterocyclic compounds)?
- Our database includes 172 publications tagged with this CPC code.
- Is patent activity under CPC C09K19/588 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).