- All sections
- C - Chemistry; metallurgy
- C07D - Heterocyclic compounds
- C07D 209/56 - Ring systems containing three or more rings
Patent holdings for IPC class C07D 209/56
Total number of patents in this class: 290
10-year publication summary
|
22
|
11
|
29
|
34
|
37
|
11
|
11
|
16
|
11
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Chem, Ltd. | 17205 |
21 |
| Duk San Neolux Co., Ltd. | 512 |
18 |
| Samsung Display Co., Ltd. | 30585 |
17 |
| Siga Technologies, Inc. | 82 |
15 |
| Doosan Corporation | 444 |
12 |
| Merck Patent GmbH | 5909 |
8 |
| AnaSpec Incorporated | 29 |
7 |
| Semiconductor Energy Laboratory Co., Ltd. | 10902 |
6 |
| Chugai Seiyaku Kabushiki Kaisha | 1259 |
6 |
| Rohm and Haas Electronic Materials Korea Ltd. | 546 |
6 |
| President and Fellows of Harvard College | 5792 |
5 |
| Reata Pharmaceuticals Holdings, LLC | 42 |
5 |
| The Regents of the University of California | 18943 |
4 |
| Xerox Corporation | 7503 |
4 |
| Idemitsu Kosan Co., Ltd. | 3995 |
4 |
| R.P. Scherer Technologies, LLC | 246 |
4 |
| UDC Ireland Limited | 496 |
3 |
| Shaanxi Lighte Optoelectronics Material Co., Ltd. | 190 |
3 |
| Samsung Electronics Co., Ltd. | 131630 |
2 |
| Centre National de La Recherche Scientifique | 9632 |
2 |
| Other owners | 138 |