Precursor compound of tetracyclic hydrocarbon and preparation method thereof
US-2026092026-A1 · Apr 2, 2026 · US
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a keto group being part of a condensed ring system
a keto group being part of a condensed ring system · 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 | C07C49/423 |
| Official title | a keto group being part of a condensed ring system |
| Display label | a keto group being part of a condensed ring system |
| Total patents | 14 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2021 | 1 |
| 2024 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Precursor compound of tetracyclic hydrocarbon and preparation method thereof, and tetracyclic hydrocarbon and preparation method and use thereof
US-12162812-B2 · Dec 10, 2024 · US
Precursor compound of tetracyclic hydrocarbon and preparation method thereof, and tetracyclic hydrocarbon and preparation method and use thereof
US-2024327318-A1 · Oct 3, 2024 · US
Triphenylene-based materials for organic electroluminescent devices
US-10971689-B2 · Apr 6, 2021 · US
Method of producing epirubicin and novel production intermediate thereof
US-10301343-B2 · May 28, 2019 · US
Neuroactive substituted cyclopent[a]anthracenes as modulators for GABA type-A receptors
US-10160738-B2 · Dec 25, 2018 · US
Triphenylene-based materials for organic electroluminescent devices
US-2018269411-A1 · Sep 20, 2018 · US
Triphenylene-based materials for organic electroluminescent devices
US-9985226-B2 · May 29, 2018 · US
Method of producing epirubicin and novel production intermediate thereof
US-2018094014-A1 · Apr 5, 2018 · US
NEUROACTIVE SUBSTITUTED CYCLOPENT[a]ANTHRACENES AS MODULATORS FOR GABA TYPE-A RECEPTORS
US-2018086727-A9 · Mar 29, 2018 · US
NEUROACTIVE SUBSTITUTED CYCLOPENT[a]ANTHRACENES AS MODULATORS FOR GABA TYPE-A RECEPTORS
US-2017233356-A1 · Aug 17, 2017 · US
Neuroactive substituted cyclopent[a]anthracenes as modulators for GABA type-A receptors
US-9562026-B2 · Feb 7, 2017 · US
Synthesis of ent-progesterone and intermediates thereof
US-2016168188-A1 · Jun 16, 2016 · US
Synthesis of ent-progesterone and intermediates thereof
US-2016016988-A1 · Jan 21, 2016 · US