- All sections
- C - Chemistry; metallurgy
- 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: 860
10-year publication summary
|
54
|
49
|
46
|
49
|
51
|
70
|
69
|
103
|
100
|
42
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Idemitsu Kosan Co., Ltd. | 3995 |
20 |
| Merck Patent GmbH | 5909 |
15 |
| LG Chem, Ltd. | 17205 |
13 |
| Gilead Sciences, Inc. | 1879 |
12 |
| Immunomedics, Inc. | 290 |
12 |
| Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd. | 211 |
11 |
| Promega Corporation | 548 |
10 |
| Abbvie Inc. | 1808 |
9 |
| Daiichi Sankyo Company, Limited | 1829 |
9 |
| ScinoPharm Taiwan, Ltd. | 131 |
9 |
| Rohm and Haas Electronic Materials Korea Ltd. | 546 |
8 |
| Shionogi & Co., Ltd. | 914 |
8 |
| Shanghai Hengrui Pharmaceutical Co., Ltd. | 588 |
7 |
| Shanghai Institute of Materia Medica, Chinese Academy of Sciences | 762 |
7 |
| Novartis AG | 11238 |
6 |
| The Regents of the University of California | 18943 |
6 |
| Centre National de La Recherche Scientifique | 9632 |
6 |
| ImmunoGen, Inc. | 405 |
6 |
| MedImmune Limited | 627 |
6 |
| Minghui Pharmaceutical (Hangzhou) Limited | 23 |
6 |
| Other owners | 674 |