- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 311/78 - Ring systems having three or more relevant rings
Patent holdings for IPC class C07D 311/78
Total number of patents in this class: 345
10-year publication summary
|
23
|
21
|
33
|
21
|
26
|
45
|
29
|
19
|
25
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Gas Chemical Company, Inc. | 3468 |
29 |
| Tokuyama Corporation | 1395 |
15 |
| Idemitsu Kosan Co., Ltd. | 4224 |
11 |
| Samsung Display Co., Ltd. | 34907 |
10 |
| Hoya Lens Thailand Ltd. | 556 |
10 |
| LG Chem, Ltd. | 17635 |
9 |
| Transitions Optical, Inc. | 257 |
8 |
| Natural Extraction Systems, LLC | 107 |
7 |
| LT Materials Co., Ltd. | 408 |
7 |
| Merck Patent GmbH | 5815 |
6 |
| Duk San Neolux Co., Ltd. | 654 |
6 |
| Northeastern University | 1193 |
6 |
| Rodenstock GmbH | 382 |
4 |
| Bessor Pharma, LLC | 12 |
4 |
| BASF SE | 20940 |
3 |
| Purdue Research Foundation | 3629 |
3 |
| Alltech, Inc. | 308 |
3 |
| Daicel Corporation | 2353 |
3 |
| General Mills, Inc. | 987 |
3 |
| Gilead Sciences, Inc. | 2032 |
3 |
| Other owners | 195 |