- 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: 170
10-year publication summary
|
12
|
8
|
13
|
8
|
13
|
10
|
6
|
2
|
9
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alkermes Pharma Ireland Limited | 260 |
21 |
| SpecGx LLC | 186 |
16 |
| Rensselaer Polytechnic Institute | 839 |
12 |
| Sun Pharmaceutical Industries Inc | 221 |
11 |
| Zevra Therapeutics, Inc. | 103 |
10 |
| Mallinckrodt LLC | 132 |
8 |
| Concert Pharmaceuticals, Inc. | 246 |
7 |
| Avanir Pharmaceuticals, Inc. | 30 |
6 |
| Heinrich-heine-universitat Dusseldorf | 80 |
6 |
| Alkermes, Inc. | 136 |
5 |
| Kappa-Pharma LLC | 4 |
4 |
| Mallinckrodt Inc. | 158 |
3 |
| Otsuka Pharmaceutical Co., Ltd. | 1498 |
3 |
| Sichuan University | 583 |
3 |
| Green Cross Corporation | 204 |
2 |
| KemPharm, Inc. | 28 |
2 |
| Nektar Therapeutics | 437 |
2 |
| Phoenix Pharmalabs, Inc. | 6 |
2 |
| Purdue Pharma L.P. | 496 |
2 |
| Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences | 179 |
2 |
| Other owners | 43 |