Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5895807 | Process for manufacturing polyester copolymers | Joseph Galko, Douglas D. Callander, Edwin A. Sisson | 1999-04-20 |
| 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 |
| 5539078 | Process for manufacturing polyester copolymers | Douglas D. Callander, Joseph Galko, Edwin A. Sisson | 1996-07-23 |
| 5223544 | Process for the removal of foreign materials from a post-consumer plyethylene terephthalate feed stream | Randy S. Jenks | 1993-06-29 |