Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12172943 | Polyalkyl p-phenylenediamine anti-degradants and intermediates and preparation method thereof | Xiangyun Guo, Gan LIANG, Jiaqiang Zhang, Zhimin Tang | 2024-12-24 |
| 12037303 | Method for preparing diaryl p-phenylenediamine compounds | Xiangyun Guo, Zhimin Tang | 2024-07-16 |
| 10793510 | Method for preparing aryl substituted p-phenylenediamine substance | Xiangyun Guo, Xiaomin Ruan, Xinmin Chen | 2020-10-06 |