- All sections
- C - Chemistry; metallurgy
- C09B - Organic dyes or closely-related compounds for producing dyes; mordants; lakes
- C09B 11/28 - Pyronines
Patent holdings for IPC class C09B 11/28
Total number of patents in this class: 236
10-year publication summary
|
29
|
28
|
25
|
32
|
23
|
21
|
14
|
8
|
15
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 27102 |
53 |
| Dai Nippon Printing Co., Ltd. | 3891 |
12 |
| The University of Tokyo | 3903 |
10 |
| Life Technologies Corporation | 3068 |
9 |
| LG Chem, Ltd. | 17205 |
8 |
| KLOX Technologies Inc. | 89 |
8 |
| Howard Hughes Medical Institute | 202 |
6 |
| Wako Pure Chemical Industries, Ltd. | 153 |
5 |
| Riken | 1669 |
5 |
| Hodogaya Chemical Co., Ltd. | 417 |
4 |
| Nippon Kayaku Kabushiki Kaisha | 1400 |
4 |
| FUJIFILM Wako Pure Chemical Corporation | 158 |
4 |
| Nitto Denko Corporation | 7879 |
3 |
| Sumitomo Chemical Company, Limited | 8808 |
3 |
| Yamamoto Chemicals, Inc. | 46 |
3 |
| Adeka Corporation | 1333 |
3 |
| DNP Fine Chemicals Co., Ltd. | 162 |
3 |
| Kyoto University | 2732 |
3 |
| Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. | 1657 |
3 |
| Mitsubishi Pencil Company, Limited | 679 |
3 |
| Other owners | 84 |