Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4975167 | Process for production of pure tungstic acid or molybdic acid from impure alkali metal tungstate or molybdate solutions | Karoly Vadasdi, Laszlo Bartha | 1990-12-04 |