Fluorescent sensors
US-2024019450-A1 · Jan 18, 2024 · US
Peri-condensed systems
Peri-condensed systems · 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 | C07D491/16 |
| Official title | Peri-condensed systems |
| Display label | Peri-condensed systems |
| Total patents | 163 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 6 |
| 2017 | 14 |
| 2018 | 12 |
| 2019 | 19 |
| 2020 | 14 |
| 2021 | 13 |
| 2022 | 21 |
| 2023 | 18 |
| 2024 | 14 |
| 2025 | 16 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Solid state forms of spiro-oxindole compounds
US-10513526-B2 · Dec 24, 2019 · US
Carbazole derivatives
US-2019348616-A1 · Nov 14, 2019 · US
Organic electric light emitting element, material for said element, and light emitting device, display device, and illumination device employing said element
US-10468607-B2 · Nov 5, 2019 · US
Fused indazole pyridone compounds as antivirals
US-2019300530-A1 · Oct 3, 2019 · US
3,6-disubstituted xanthylium salts
US-10399955-B2 · Sep 3, 2019 · US
Tricyclic gyrase inhibitors
US-10385055-B2 · Aug 20, 2019 · US
Quencher
US-10377713-B2 · Aug 13, 2019 · US
Azatriangulenium salts as PET-quenched fluorescent probes
US-10364249-B2 · Jul 30, 2019 · US
Class of organic phosphors based on derivatives of benzimidazoxanthenoisoquinolinone for LED lighting
US-10329482-B2 · Jun 25, 2019 · US
Fused indazole pyridone compounds as antivirals
US-10301312-B2 · May 28, 2019 · US
Solid state forms of spiro-oxindole compounds
US-2019071449-A1 · Mar 7, 2019 · US
Real-time imaging sensor for measuring cellular thiol level
US-10215757-B2 · Feb 26, 2019 · US
Macrocyclic MCL-1 inhibitors and methods of use
US-2019055264-A1 · Feb 21, 2019 · US
Bi-benzyl isoquinoline derivative, preparation method and use thereof in hepatopathy treatment and prevention
US-10189812-B2 · Jan 29, 2019 · US
Cyanated benzoxanthene and benzothioxanthene compounds
US-2019010165-A1 · Jan 10, 2019 · US
Benzopyrylium compounds
US-10174045-B2 · Jan 8, 2019 · US
Carboxy X rhodamine analogs
US-10139400-B2 · Nov 27, 2018 · US
Cyanated benzoxanthene and benzothioxanthene compounds
US-10125143-B2 · Nov 13, 2018 · US
Solid state forms of spiro-oxindole compounds
US-10118932-B2 · Nov 6, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D491/16?
- CPC C07D491/16 is the Cooperative Patent Classification code for “Peri-condensed systems.”
- How many patents are filed under CPC C07D491/16 (Peri-condensed systems)?
- Our database includes 163 publications tagged with this CPC code.
- Is patent activity under CPC C07D491/16 growing?
- Publication counts under this code: 14 in 2024 vs 16 in 2025 (latest complete years).