- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 221/28 - Morphinans
Patent holdings for IPC class C07D 221/28
Total number of patents in this class: 157
10-year publication summary
|
12
|
9
|
13
|
9
|
14
|
11
|
7
|
2
|
9
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alkermes Pharma Ireland Limited | 286 |
21 |
| SpecGx LLC | 196 |
16 |
| Rensselaer Polytechnic Institute | 810 |
13 |
| Sun Pharmaceutical Industries Inc | 203 |
11 |
| Zevra Therapeutics, Inc. | 90 |
9 |
| Mallinckrodt LLC | 133 |
8 |
| Concert Pharmaceuticals, Inc. | 252 |
7 |
| Avanir Pharmaceuticals, Inc. | 32 |
6 |
| Alkermes, Inc. | 133 |
5 |
| Heinrich-heine-universitat Dusseldorf | 79 |
4 |
| Mallinckrodt Inc. | 193 |
4 |
| Kappa-Pharma LLC | 4 |
4 |
| Otsuka Pharmaceutical Co., Ltd. | 1544 |
3 |
| Sichuan University | 545 |
3 |
| Green Cross Corporation | 182 |
2 |
| KemPharm, Inc. | 32 |
2 |
| Nektar Therapeutics | 459 |
2 |
| Phoenix Pharmalabs, Inc. | 7 |
2 |
| Purdue Pharma L.P. | 510 |
2 |
| Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences | 167 |
2 |
| Other owners | 31 |