- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 305/14 - Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms condensed with carbocyclic rings or ring systems
Patent holdings for IPC class C07D 305/14
Total number of patents in this class: 306
10-year publication summary
|
14
|
17
|
16
|
12
|
16
|
8
|
8
|
13
|
13
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Indena S.p.A. | 626 |
12 |
| Nektar Therapeutics | 438 |
7 |
| Aventis Pharma S.A. | 54 |
6 |
| Fresenius Kabi Oncology Limited | 66 |
6 |
| Novomer, Inc. | 212 |
6 |
| Alethia Biotherapeutics Inc. | 21 |
5 |
| Shenyang Pharmaceutical University | 108 |
5 |
| Starpharma Pty Limited | 69 |
5 |
| The University of British Columbia | 1495 |
5 |
| Shanghai Parling Pharma-Tech. Co., Ltd. | 5 |
5 |
| 6570763 Canada Inc. | 4 |
4 |
| Hanmi Pharm. Co., Ltd. | 571 |
4 |
| The Research Foundation for The State University of New York | 1621 |
4 |
| Shilpa Medicare Limited | 110 |
4 |
| Tapestry Pharmaceuticals, Inc. | 26 |
4 |
| AstraZeneca AB | 2892 |
3 |
| Life Technologies Corporation | 3306 |
3 |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 671 |
3 |
| Inner Mongolia Puyin Pharmaceutical Co., Ltd | 10 |
3 |
| Institute of Materia Medica, Chinese Academy of Medical Sciences | 178 |
3 |
| Other owners | 209 |