Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6031142 | Alternative solvents for a method of reclaiming styrene and other products from polystyrene based materials | Henry T. Ponsford | 2000-02-29 |
| 6018085 | Method of reclaiming styrene and other products from polystyrene based materials | Henry T. Ponsford | 2000-01-25 |
| 5799626 | Methods for using styrene oil (as heat transfer fluid, hydraulic fluid, lubricant) | Henry T. Ponsford | 1998-09-01 |
| 5502263 | Method of reclaiming styrene and other products from polystyrene based products | Henry T. Ponsford | 1996-03-26 |
| 5406010 | Method of reclaiming styrene and other products from polystyrene based products | Henry T. Ponsford | 1995-04-11 |