- 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: 262
10-year publication summary
|
25
|
32
|
23
|
21
|
14
|
8
|
14
|
12
|
13
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 30514 |
55 |
| Dai Nippon Printing Co., Ltd. | 4238 |
12 |
| The University of Tokyo | 4361 |
11 |
| Life Technologies Corporation | 3458 |
10 |
| LG Chem, Ltd. | 17921 |
8 |
| Sumitomo Chemical Company, Limited | 9016 |
8 |
| KLOX Technologies Inc. | 65 |
7 |
| Howard Hughes Medical Institute | 230 |
6 |
| Riken | 1717 |
6 |
| Wako Pure Chemical Industries, Ltd. | 119 |
5 |
| F. Hoffmann-La Roche AG | 7837 |
4 |
| Yamamoto Chemicals, Inc. | 50 |
4 |
| DNP Fine Chemicals Co., Ltd. | 183 |
4 |
| Hodogaya Chemical Co., Ltd. | 431 |
4 |
| Nippon Kayaku Kabushiki Kaisha | 1454 |
4 |
| FUJIFILM Wako Pure Chemical Corporation | 191 |
4 |
| Canon Kabushiki Kaisha | 7314 |
4 |
| Hoffmann-La Roche Inc. | 3793 |
3 |
| Nitto Denko Corporation | 8536 |
3 |
| Adeka Corporation | 1377 |
3 |
| Other owners | 97 |