- All sections
- C - Chemistrymetallurgy
- C09B - Organic dyes or closely-related compounds for producing dyesmordantslakes
- C09B 11/28 - Pyronines
Patent holdings for IPC class C09B 11/28
Total number of patents in this class: 257
10-year publication summary
|
28
|
25
|
30
|
21
|
19
|
13
|
7
|
14
|
12
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 29437 |
55 |
| Dai Nippon Printing Co., Ltd. | 4091 |
12 |
| The University of Tokyo | 4189 |
10 |
| Life Technologies Corporation | 3306 |
9 |
| LG Chem, Ltd. | 17635 |
8 |
| Sumitomo Chemical Company, Limited | 9043 |
8 |
| KLOX Technologies Inc. | 69 |
8 |
| Howard Hughes Medical Institute | 229 |
6 |
| Wako Pure Chemical Industries, Ltd. | 133 |
5 |
| Riken | 1691 |
5 |
| F. Hoffmann-La Roche AG | 7947 |
4 |
| Yamamoto Chemicals, Inc. | 50 |
4 |
| DNP Fine Chemicals Co., Ltd. | 178 |
4 |
| Hodogaya Chemical Co., Ltd. | 436 |
4 |
| Nippon Kayaku Kabushiki Kaisha | 1435 |
4 |
| FUJIFILM Wako Pure Chemical Corporation | 164 |
4 |
| Hoffmann-La Roche Inc. | 3439 |
3 |
| Nitto Denko Corporation | 8253 |
3 |
| Adeka Corporation | 1365 |
3 |
| Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. | 1780 |
3 |
| Other owners | 95 |