Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5328035 | Lithium metatungstate | Houyuan Liu, Nicholas L. Labao, Purusotam L. Shrestha | 1994-07-12 |
| 5292490 | Recovery platinum group metals from oxides ores | Houyuan Liu, Saskia Duyvesteyn | 1994-03-08 |