Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886929 | Separation of para-xylene | Richard W. Neuzil | 1989-12-12 |
| 4870223 | Catalytic process for the conversion of hydrocarbons | Daniel L. Ellig | 1989-09-26 |
| 4822762 | Catalyst for the conversion of hydrocarbons | Daniel L. Ellig | 1989-04-18 |