- All sections
- C - Chemistrymetallurgy
- C09B - Organic dyes or closely-related compounds for producing dyesmordantslakes
- C09B 31/057 - Amino naphthalenes containing acid groups, e.g. —COOH, —SO3H, —PO3H2, —OSO3H, —OPO2H2Salts thereof
Patent holdings for IPC class C09B 31/057
Total number of patents in this class: 13
10-year publication summary
|
1
|
0
|
2
|
1
|
0
|
2
|
0
|
0
|
1
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The Regents of the University of California | 20924 |
3 |
| Hewlett-Packard Development Company, L.P. | 25121 |
2 |
| Nitto Denko Corporation | 8632 |
2 |
| BASF SE | 21318 |
1 |
| Hodogaya Chemical Co., Ltd. | 435 |
1 |
| Massachusetts Eye & Ear Infirmary | 94 |
1 |
| Nippon Kayaku Kabushiki Kaisha | 1474 |
1 |
| Polatechno Co., Ltd. | 107 |
1 |
| Chromascape, LLC | 44 |
1 |
| Other owners | 0 |