Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5207894 | Removal of aromatic color bodies from aromatic hydrocarbon streams | Stewart H. Presnall, Robert J. Haynal, Martin P. Grosboll, Pamela A. Yanchik | 1993-05-04 |
| 5081325 | Purification of unsaturated hydrocarbon streams containing styrenics | Robert J. Haynal, Stewart H. Presnall | 1992-01-14 |