Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883783 | Composition of matter for conversion of hydrocarbons | Emmett H. Burk, Jr., Cecelia A. Radlowski | 1989-11-28 |
| 4824814 | Catalyst treatment and process for using treated catalyst | Frank J. Elvin | 1989-04-25 |
| 4800185 | Regeneraation of metal contaminated hydrocarbon conversion catalytsts | Frank J. Elvin, Jan Otterstedt | 1989-01-24 |