Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240967 | Method for improving the expandability of styrenic polymer particles | Fred Sonnenberg, William J. Poole | 1993-08-31 |
| 5030663 | Process for the preparation of fire-retardant expandable thermoplastic beads | Fred Sonnenberg | 1991-07-09 |
| 4994499 | Method of adding flame retardant to vinyl aromatic polymers made in a one-step process | Fred Sonnenberg | 1991-02-19 |
| 4980382 | Process for the preparation of expandable vinyl aromatic polymer particles containing hexabromocyclododecane | Fred Sonnenberg | 1990-12-25 |
| 4785022 | Use of rubbery copolymers to decrease coffee leakage in foam cups | Fred Sonnenberg | 1988-11-15 |
| 4761432 | Coating of flame retardants onto a seed bead | Fred Sonnenberg | 1988-08-02 |
| 4673694 | Higher molecular weight thermoplastics having multimodal molecular weight distribution | Bernard H. Meyer, Adolph V. DiGiulio, Joseph C. Kinslow | 1987-06-16 |
| 4663357 | Higher molecular weight thermoplastics having multimodal molecular weight distribution | Bernard H. Meyer, Adolph V. DiGiulio, Joseph C. Kinslow | 1987-05-05 |