Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437854 | Process for purifying zirconium tetrachloride | Roy G. Walker | 1995-08-01 |
| 5076884 | Process of precipitating zirconium or hafnium from spent pickling solutions | Roy G. Walker | 1991-12-31 |