Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663456 | Method for obtaining large crystals with high purity by destructing part of fines in slurry in a crystallizer | Minhua Zhang, Shenbo Yu, Chuanzhao Li, Shenghua Qian | 1997-09-02 |
| 5648561 | Process for the production of high purity and ultrapure bisphenol-A | Qiu Tan, Minhua Zhang, Shenbo Yu, Shenghua Qian, Chuanzhao Li | 1997-07-15 |
| 5629457 | Dephenolizing process for production of high-quality polycarbonate grade bisphenol A | Minhua Zhang, Shenbo Yu, Shenghua Qian, Chuanzhao Li | 1997-05-13 |