- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 311/92 - NaphthopyransHydrogenated naphthopyrans
Patent holdings for IPC class C07D 311/92
Total number of patents in this class: 154
10-year publication summary
|
11
|
10
|
13
|
7
|
6
|
8
|
6
|
16
|
7
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Transitions Optical, Inc. | 253 |
9 |
| Idemitsu Kosan Co., Ltd. | 4222 |
6 |
| Essilor International (compagnie Generale D'optique) | 2990 |
6 |
| Rodenstock GmbH | 383 |
6 |
| The Board of Regents of the University of Texas System | 2216 |
6 |
| Mitsubishi Gas Chemical Company, Inc. | 3481 |
5 |
| Tokuyama Corporation | 1403 |
5 |
| Alphamicron Incorporated | 87 |
4 |
| ArQule, Inc. | 135 |
4 |
| Hoya Lens Thailand Ltd. | 561 |
4 |
| BASF SE | 20961 |
3 |
| The Regents of the University of California | 20035 |
3 |
| East China University of Science and Technology | 518 |
3 |
| Shanghai Institute of Materia Medica, Chinese Academy of Sciences | 833 |
3 |
| Shandong Biopolar Dichang Pharmaceutical Co., Ltd. | 3 |
3 |
| Covation Inc. | 82 |
3 |
| Janssen Pharmaceutica N.V. | 3381 |
2 |
| Merck Patent GmbH | 5820 |
2 |
| DSM IP Assets B.V. | 5582 |
2 |
| Northwestern University | 3407 |
2 |
| Other owners | 73 |