Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5612423 | Process for manufacturing polyester copolymers containing terephthalate and naphthalate units | Douglas D. Callander, Joseph Galko, Edwin A. Sisson | 1997-03-18 |
| 5594092 | Process for manufacturing polyester copolymers | Douglas D. Callander, Joseph Galko, Edwin A. Sisson | 1997-01-14 |