Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343773 | Enhanced leaching of minerals which form product layers | George Simkovich | 1982-08-10 |
| 4337143 | Process for obtaining products from tar sand | Francis V. Hanson, Alex G. Oblad | 1982-06-29 |