- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 493/22 - Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains four or more hetero rings
Patent holdings for IPC class C07D 493/22
Total number of patents in this class: 341
10-year publication summary
|
26
|
21
|
32
|
35
|
32
|
32
|
17
|
21
|
11
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Eisai R&D Management Co., Ltd. | 1270 |
54 |
| President and Fellows of Harvard College | 5914 |
29 |
| Alphora Research Inc. | 28 |
10 |
| Merck Patent GmbH | 5856 |
6 |
| Dr. Reddy's Laboratories Limited | 562 |
6 |
| Aphios Corporation | 43 |
5 |
| Lixte Biotechnology, Inc. | 64 |
5 |
| Universal Display Corporation | 1822 |
5 |
| The Johns Hopkins University | 5540 |
4 |
| Arizona Board of Regents on behalf of Arizona State University | 2469 |
4 |
| Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. | 1754 |
4 |
| Zhejiang Hisun Pharmaceutical Co., Ltd. | 270 |
4 |
| Solutia Canada Inc | 44 |
4 |
| LG Chem, Ltd. | 17657 |
3 |
| The Regents of the University of California | 19572 |
3 |
| FUJIFILM Corporation | 28841 |
3 |
| The Board of Trustees of the Leland Stanford Junior University | 6259 |
3 |
| The Administrators of the Tulane Educational Fund | 385 |
3 |
| Georgetown University | 604 |
3 |
| Kunming Institute of Botany, Chinese Academy of Sciences | 34 |
3 |
| Other owners | 180 |