- All sections
- C - Chemistrymetallurgy
- 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: 300
10-year publication summary
|
29
|
35
|
37
|
11
|
10
|
17
|
10
|
14
|
10
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Chem, Ltd. | 17921 |
21 |
| Samsung Display Co., Ltd. | 38570 |
18 |
| Duk San Neolux Co., Ltd. | 703 |
18 |
| Siga Technologies, Inc. | 82 |
15 |
| Doosan Corporation | 431 |
12 |
| Merck Patent GmbH | 5725 |
11 |
| Reata Pharmaceuticals Holdings, LLC | 52 |
7 |
| The Regents of the University of California | 20720 |
6 |
| Chugai Seiyaku Kabushiki Kaisha | 1422 |
5 |
| Semiconductor Energy Laboratory Co., Ltd. | 11797 |
4 |
| Idemitsu Kosan Co., Ltd. | 4234 |
4 |
| Rohm and Haas Electronic Materials Korea Ltd. | 332 |
4 |
| Centre National de La Recherche Scientifique | 11016 |
3 |
| AnaSpec Incorporated | 15 |
3 |
| R.P. Scherer Technologies, LLC | 335 |
3 |
| UDC Ireland Limited | 508 |
3 |
| Shaanxi Lighte Optoelectronics Material Co., Ltd. | 317 |
3 |
| DuPont Specialty Materials Korea Ltd. | 302 |
3 |
| Mainstream Pine Products, LLC | 58 |
3 |
| FUJIFILM Corporation | 30512 |
2 |
| Other owners | 152 |