Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5328035 | Lithium metatungstate | Willem P. C. Duyvesteyn, Nicholas L. Labao, Purusotam L. Shrestha | 1994-07-12 |
| 5304359 | Dissolution of platinum group metals from materials containing said metals | Willem D. C. Duyvesteyn, Saskia Duyvesteyn | 1994-04-19 |
| 5292490 | Recovery platinum group metals from oxides ores | Willem P. C. Duyvesteyn, Saskia Duyvesteyn | 1994-03-08 |