Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861856 | Process for the preparation of polyketone and poly(ketone-sulfone) polymers | W. Ronald Darnell | 1989-08-29 |
| 4849499 | Melt processable, liquid crystalline polyesters | David R. Fagerburg, Mary Martin | 1989-07-18 |
| 4839459 | Process for the preparation of poly(ether-ketone) polymers | W. Ronald Darnell | 1989-06-13 |
| 4824931 | Polyesters from trans-4,4'-stilbenedicarboxylic acid and 1,6-hexanediol | John C. Morris | 1989-04-25 |
| 4820794 | Process for preparing polyketone in the presence of perfluoroalkyl sulfonic acid and oxide of phosphorus | William R. Darnell | 1989-04-11 |