- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 321/28 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to carbon atoms of six-membered aromatic rings
Patent holdings for IPC class C07C 321/28
Total number of patents in this class: 239
10-year publication summary
|
14
|
24
|
17
|
10
|
9
|
12
|
13
|
13
|
16
|
9
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Miyoshi Oil & Fat Co., Ltd. | 112 |
7 |
| FUJIFILM Corporation | 30689 |
6 |
| Bristol-myers Squibb Company | 4757 |
5 |
| Tokai Optical Co., Ltd. | 130 |
5 |
| Caamtech, Inc. | 152 |
5 |
| F. Hoffmann-La Roche AG | 7798 |
4 |
| BASF SE | 21320 |
4 |
| Bayer AG | 3553 |
4 |
| Bayer Cropscience AG | 1830 |
4 |
| Shin-Etsu Chemical Co., Ltd. | 6143 |
4 |
| Tokyo Ohka Kogyo Co., Ltd. | 1556 |
4 |
| Ube Corporation | 458 |
4 |
| Sumitomo Chemical Company, Limited | 8965 |
3 |
| DIC Corporation | 3995 |
3 |
| Insight High Technology (Beijing) Co. Ltd. | 9 |
3 |
| Jiangsu Hengrui Medicine Co., Ltd. | 686 |
3 |
| Kumiai Chemical Industry Co., Ltd. | 314 |
3 |
| Shanghai Hengrui Pharmaceutical Co., Ltd. | 722 |
3 |
| Shikoku Chemicals Corporation | 105 |
3 |
| Southern Research Institute | 203 |
3 |
| Other owners | 159 |