Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846370 | Sphere based fluid systems | Daniel D. Elleman | 1989-07-11 |
| 4820503 | Catalytic hollow spheres | Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr. | 1989-04-11 |
| 4804796 | Catalytic, hollow, refractory spheres, conversions with them | Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr. | 1989-02-14 |