- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings
Patent holdings for IPC class C07D 491/22
Total number of patents in this class: 1255
10-year publication summary
|
46
|
50
|
51
|
71
|
71
|
105
|
115
|
144
|
157
|
145
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd. | 411 |
40 |
| Gilead Sciences, Inc. | 2265 |
23 |
| Idemitsu Kosan Co., Ltd. | 4293 |
22 |
| Hangzhou Adcoris Biopharma Co., Ltd. | 36 |
21 |
| Merck Sharp & Dohme LLC | 3723 |
19 |
| Merck Patent GmbH | 5772 |
14 |
| Minghui Pharmaceutical (Hangzhou) Limited | 47 |
14 |
| Minghui Pharmaceutical (Shanghai) Limited | 48 |
14 |
| Shanghai Qilu Pharmaceutical Research and Development Centre Ltd. | 132 |
14 |
| LG Chem, Ltd. | 18005 |
13 |
| Nuvalent, Inc. | 92 |
13 |
| Immunomedics, Inc. | 239 |
11 |
| Daiichi Sankyo Company, Limited | 1895 |
10 |
| Shanghai Hengrui Pharmaceutical Co., Ltd. | 736 |
10 |
| Promega Corporation | 575 |
9 |
| Pinotbio, Inc. | 51 |
9 |
| Amgen Inc. | 4492 |
8 |
| Abbvie Inc. | 1812 |
8 |
| Jiangsu Hengyi Pharmaceutical Co., Ltd. | 389 |
8 |
| ScinoPharm Taiwan, Ltd. | 128 |
8 |
| Other owners | 967 |