Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833219 | Preparation of substituted polysulfones by metalation | Michael D. Guiver, John W. ApSimon | 1989-05-23 |
| 4814088 | Method for the molecular filtration of predominantly aliphatic hydrocarbon liquids | Thomas A. Tweddle, John D. Hazlett | 1989-03-21 |
| 4797457 | Preparation of substituted polysulfones through ortho-metalated intermediates | Michael D. Guiver, John W. ApSimon | 1989-01-10 |