Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6107526 | Process for producing ethyl tertiary butyl ether | Stanley J. Frey, Steven L. Krupa, Paul R. Cottrell | 2000-08-22 |
| 5990361 | Process for producing ethyl tertiary butyl ether by catalytic distillation | Stanley J. Frey, Steven L. Krupa, Paul R. Cottrell | 1999-11-23 |