- All sections
- C - Chemistrymetallurgy
- C09B - Organic dyes or closely-related compounds for producing dyesmordantslakes
- C09B 33/28 - Tetrazo dyes of the type A → B → K ← C ← D
Patent holdings for IPC class C09B 33/28
Total number of patents in this class: 24
10-year publication summary
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0
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1
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1
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1
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0
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1
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0
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1
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Kayaku Kabushiki Kaisha | 1465 |
13 |
| Polatechno Co., Ltd. | 110 |
6 |
| FUJIFILM Corporation | 30210 |
2 |
| Seiko Epson Corporation | 19988 |
1 |
| Ilford Imaging Switzerland GmbH | 7 |
1 |
| Rex-Tone Industries Ltd | 4 |
1 |
| Other owners | 0 |