- All sections
- C - Chemistry; metallurgy
- C07D - Heterocyclic compounds
- C07D 311/92 - Naphthopyrans; Hydrogenated naphthopyrans
Patent holdings for IPC class C07D 311/92
Total number of patents in this class: 158
10-year publication summary
|
12
|
10
|
14
|
7
|
7
|
8
|
6
|
16
|
8
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Transitions Optical, Inc. | 281 |
14 |
| Essilor International (compagnie Generale D'optique) | 2946 |
6 |
| Rodenstock GmbH | 374 |
6 |
| The Board of Regents of the University of Texas System | 2130 |
6 |
| Idemitsu Kosan Co., Ltd. | 4106 |
5 |
| Mitsubishi Gas Chemical Company, Inc. | 3343 |
5 |
| Alphamicron Incorporated | 79 |
4 |
| ArQule, Inc. | 139 |
4 |
| Tokuyama Corporation | 1340 |
4 |
| BASF SE | 20387 |
3 |
| The Regents of the University of California | 19493 |
3 |
| East China University of Science and Technology | 491 |
3 |
| Hoya Lens Thailand Ltd. | 511 |
3 |
| Shanghai Institute of Materia Medica, Chinese Academy of Sciences | 805 |
3 |
| Shandong Biopolar Dichang Pharmaceutical Co., Ltd. | 3 |
3 |
| Covation Inc. | 88 |
3 |
| Janssen Pharmaceutica N.V. | 3624 |
2 |
| Merck Patent GmbH | 5847 |
2 |
| DSM IP Assets B.V. | 5819 |
2 |
| Northwestern University | 3272 |
2 |
| Other owners | 75 |