Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5408015 | Mixed chromium catalyst,and alkene and alkyl aluminum hydride-modified ziegler catalyst for multimodal HDPE | John T. T. Hsieh | 1995-04-18 |
| 5284613 | Producing blown film and blends from bimodal high density high molecular weight film resin using magnesium oxide-supported Ziegler catalyst | Ahmed Ali, John T. T. Hsieh, Keith J. Kauffman, Yury V. Kissin, S. Christine Ong +2 more | 1994-02-08 |
| 5006506 | Modified chromium-containing catalyst composition for polymerizing olefins and method of preparing the catalyst composition | John T. T. Hsieh | 1991-04-09 |
| 4908341 | Method for reactivating spent catalyst by contact with one or more aromatic compounds | Chaya R. Venkat, Darrell D. Whitehurst | 1990-03-13 |