Compound or salt thereof
US-12551578-B2 · Feb 17, 2026 · US
Phenanthridines
Phenanthridines · 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 | C07D221/12 |
| Official title | Phenanthridines |
| Display label | Phenanthridines |
| Total patents | 62 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 6 |
| 2021 | 11 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 6 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polymerizable fused tricyclic compounds as absorbers of UV and visible light
US-12509428-B2 · Dec 30, 2025 · US
Organic material for an electronic optoelectronic device and electronic device comprising the organic material
US-12492168-B2 · Dec 9, 2025 · US
Photocatalysts, preparation and use thereof
US-2025367649-A1 · Dec 4, 2025 · US
Inhibitors of kinase networks and uses thereof
US-12384782-B2 · Aug 12, 2025 · US
Compounds for treating microbial infections, methods of making and uses thereof
US-2025066306-A1 · Feb 27, 2025 · US
Inhibitors of kinase networks and uses thereof
US-2024208971-A1 · Jun 27, 2024 · US
Quinolines, polyquinolines, molecular segments of fullerenes and graphene nanoribbons, and graphene nanoribbons and methods of their synthesis
US-11945780-B2 · Apr 2, 2024 · US
Novel naphthalimide sulfonate derivative, and photoacid generator and photoresist composition each comprising same
US-2024085786-A1 · Mar 14, 2024 · US
Polymers for use in electronic devices
US-11898011-B2 · Feb 13, 2024 · US
Inhibitors of kinase networks and uses thereof
US-11891391-B2 · Feb 6, 2024 · US
Heterocyclic compound and organic light emitting device comprising same
US-11891361-B2 · Feb 6, 2024 · US
Nucleic acid crosslinking reagents and uses thereof
US-2023366045-A1 · Nov 16, 2023 · US
Phenanthrene organic compound and use thereof
US-2023357188-A1 · Nov 9, 2023 · US
Theranostic nucleic acid binding fluorescent nanoprobes and uses thereof
US-11779661-B2 · Oct 10, 2023 · US
Compounds having valerolactam structures
US-11713319-B2 · Aug 1, 2023 · US
Substituted bicyclic and tricyclic ureas and amides, analogues thereof, and methods using same
US-2023108906-A1 · Apr 6, 2023 · US
Compound or salt thereof
US-2022401590-A1 · Dec 22, 2022 · US
Multidentate phenanthridine-containing ligand frameworks and their planar monofunctional platinum complexes for cancer treatment
US-11304958-B2 · Apr 19, 2022 · US
Nucleic acid modifying reagents and uses thereof
US-2022064710-A1 · Mar 3, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D221/12?
- CPC C07D221/12 is the Cooperative Patent Classification code for “Phenanthridines.”
- How many patents are filed under CPC C07D221/12 (Phenanthridines)?
- Our database includes 62 publications tagged with this CPC code.
- Is patent activity under CPC C07D221/12 growing?
- Publication counts under this code: 6 in 2024 vs 5 in 2025 (latest complete years).