- All sections
- C - Chemistrymetallurgy
- C09B - Organic dyes or closely-related compounds for producing dyesmordantslakes
- C09B 35/20 - Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl from two coupling compounds of different types
Patent holdings for IPC class C09B 35/20
Total number of patents in this class: 9
10-year publication summary
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1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Dai Nippon Printing Co., Ltd. | 4267 |
2 |
| e Ink Corporation | 1559 |
2 |
| Sun Chemical Corporation | 807 |
2 |
| Merck Patent GmbH | 5755 |
1 |
| Dainichiseika Color & Chemicals Mfg. Co., Ltd. | 385 |
1 |
| DIC Corporation | 4000 |
1 |
| Other owners | 0 |