- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 211/51 - Phenylenediamines
Patent holdings for IPC class C07C 211/51
Total number of patents in this class: 88
10-year publication summary
|
2
|
9
|
4
|
8
|
3
|
3
|
7
|
8
|
2
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Infineum International Limited | 391 |
4 |
| BASF SE | 20915 |
3 |
| Chemtura Corporation | 157 |
3 |
| Qingdao University of Science & Technology | 28 |
3 |
| Shandong Xingqiang Chemical Industry Technology Research Institute Co., Ltd | 7 |
3 |
| Zydus Lifesciences Limited | 114 |
3 |
| Samsung Electronics Co., Ltd. | 146346 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2750 |
2 |
| Collaborative Medicinal Development, LLC | 9 |
2 |
| Dongjin Semichem Co., Ltd. | 487 |
2 |
| Ecolab USA Inc. | 5491 |
2 |
| INVISTA Technologies S.a.r.l. | 415 |
2 |
| Lanxess Corporation | 272 |
2 |
| Seikagaku Corporation | 186 |
2 |
| Shanghai Haiyan Pharmaceutical Technology Co. Ltd | 108 |
2 |
| Shanghai Institute of Materia Medica, Chinese Academy of Sciences | 827 |
2 |
| Tohoku University | 2785 |
2 |
| Topharman Shanghai Co., Ltd. | 54 |
2 |
| Yangtze River Pharmaceutical (Group) Co., Ltd. | 143 |
2 |
| Sennics Co., Ltd. | 95 |
2 |
| Other owners | 41 |