Metal complexes
US-9831448-B2 · Nov 28, 2017 · US
Bridged ring systems
Bridged ring 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 | C07D221/22 |
| Official title | Bridged ring systems |
| Display label | Bridged ring systems |
| Total patents | 154 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 24 |
| 2016 | 18 |
| 2017 | 18 |
| 2018 | 20 |
| 2019 | 16 |
| 2020 | 14 |
| 2021 | 11 |
| 2022 | 6 |
| 2023 | 6 |
| 2024 | 13 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Morphinan Derivatives for the Treatment of Drug Overdose
US-2017333422-A1 · Nov 23, 2017 · US
Spiroacridine-Triazine Hybrids and Applications for Electroluminescent Devices
US-2017320855-A1 · Nov 9, 2017 · US
LSD1 inhibitors
US-9809541-B2 · Nov 7, 2017 · US
Compositions and Methods for Inhibiting BMP
US-2017305883-A1 · Oct 26, 2017 · US
Tetrahydroisoquinolines as selective NADPH oxidase 2 inhibitors
US-9796681-B2 · Oct 24, 2017 · US
5-ht3 receptor antagonists
US-2017260201-A1 · Sep 14, 2017 · US
Inhibitors of hif prolyl hydroxylase
US-2017240555-A1 · Aug 24, 2017 · US
8-carboxamido-2,6-methano-3-benzazocines
US-2017217977-A1 · Aug 3, 2017 · US
Methods for treating depressive symptoms
US-2017216279-A1 · Aug 3, 2017 · US
Therapeutic compounds and methods of use thereof
US-2017190662-A1 · Jul 6, 2017 · US
5-HT3 receptor antagonists
US-9695195-B2 · Jul 4, 2017 · US
LSD1 Inhibitors
US-2017183308-A1 · Jun 29, 2017 · US
Atx modulating agents
US-2017158687-A1 · Jun 8, 2017 · US
5-HT3 receptor antagonists
US-9670229-B2 · Jun 6, 2017 · US
Ring-contracted morphinans and the use thereof
US-9656962-B2 · May 23, 2017 · US
Methods for treating depressive symptoms
US-9656961-B2 · May 23, 2017 · US
Azepane derivatives and methods of treating hepatitis b infections
US-2017015629-A1 · Jan 19, 2017 · US
ATX modulating agents
US-9522889-B2 · Dec 20, 2016 · US
Azepane derivatives and methods of treating hepatitis B infections
US-9505722-B2 · Nov 29, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D221/22?
- CPC C07D221/22 is the Cooperative Patent Classification code for “Bridged ring systems.”
- How many patents are filed under CPC C07D221/22 (Bridged ring systems)?
- Our database includes 154 publications tagged with this CPC code.
- Is patent activity under CPC C07D221/22 growing?
- Publication counts under this code: 13 in 2024 vs 6 in 2025 (latest complete years).