Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885149 | Recovery and purification of silica | Anthony S. W. De Freitas, Archibald W. McCulloch | 1989-12-05 |
| 4424373 | Secalonic acids | Itsuo Kurobane, Leo C. Vining | 1984-01-03 |