Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5912275 | Process for depolymerizing polyester | Stephen Hall, Richard Redfearn Hepner, Donald Richard Wheatcraft, Jr., George Malcolm Williamson | 1999-06-15 |
| 5504122 | Recovery of dimethyl terephthalate from polymer mixtures | George Malcolm Williamson | 1996-04-02 |
| 5391263 | Process for the separation of glycols from dimethyl terephthalate | Richard Redfearn Hepner, Robert E. Trotter | 1995-02-21 |
| 5142097 | Recovery and recycle of acetic acid in an oxidation process | Roger G. Rudolph | 1992-08-25 |
| 4952668 | Process for the production of polyethyleneterephthalate from dimethylterephthalate | — | 1990-08-28 |
| 4910175 | Catalyst recovery | Matthew R. Kegelman, Frederick J. Sebelist | 1990-03-20 |
| 4734309 | Form of solid dimethylterephthalate | Mark S. Katzenberger, Roger G. Rudolph | 1988-03-29 |