Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4438161 | Iron-containing refractory balls for retorting oil shale | — | 1984-03-20 |
| 4421701 | Process for preparing iron-containing refractory balls for retorting oil shale | — | 1983-12-20 |
| 4404152 | Iron-containing refractory balls for retorting oil shale | — | 1983-09-13 |
| 4402886 | Tron-containing refractory balls for retorting oil shale | — | 1983-09-06 |
| 4371481 | Iron-containing refractory balls for retorting oil shale | — | 1983-02-01 |
| 4360565 | Iron-containing refractory balls for retorting oil shale | — | 1982-11-23 |