- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 491/147 - Ortho-condensed systems the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
Patent holdings for IPC class C07D 491/147
Total number of patents in this class: 634
10-year publication summary
|
51
|
54
|
59
|
41
|
50
|
39
|
51
|
64
|
59
|
21
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Idemitsu Kosan Co., Ltd. | 4129 |
22 |
| Merck Patent GmbH | 5825 |
15 |
| Amgen Inc. | 3985 |
12 |
| Purdue Research Foundation | 3538 |
11 |
| Duk San Neolux Co., Ltd. | 620 |
10 |
| Merck Sharp & Dohme LLC | 3724 |
10 |
| Eisai R&D Management Co., Ltd. | 1234 |
9 |
| Bristol-myers Squibb Company | 4848 |
8 |
| Trustees of Boston University | 969 |
8 |
| Samsung Display Co., Ltd. | 33684 |
7 |
| Illumina Cambridge Limited | 675 |
7 |
| Rohm and Haas Electronic Materials Korea Ltd. | 330 |
7 |
| Hoffmann-La Roche Inc. | 3344 |
6 |
| Boehringer Ingelheim International GmbH | 4732 |
6 |
| Pfizer Inc. | 3331 |
6 |
| Konica Minolta, Inc. | 8613 |
6 |
| Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd. | 271 |
6 |
| Convalife (Shanghai) Co., Ltd. | 17 |
6 |
| LG Chem, Ltd. | 17464 |
5 |
| Arizona Board of Regents on behalf of Arizona State University | 2538 |
5 |
| Other owners | 462 |