Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840759 | Isopentane as blowing agent to improve coffee retention in foam cups molded from expandable polystyrene | Paul E. Arch | 1989-06-20 |
| 4798749 | Isopentane as blowing agent to improve coffee retention in foam cups molded from expandable polystrene | Paul E. Arch | 1989-01-17 |