Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7577845 | Information matrix cryptogram | — | 2009-08-18 |
| 5639433 | Extraction of rare earth elements using alkyl phosphinic acid or salt/alkyl or aryl phosphonic acid or ester blends as extractant | Chengye Yuan | 1997-06-17 |
| 5622679 | Extraction of rare earth elements using alkyl phosphinic acid or salt/tetraalkylammonium salt as extractant | Chengye Yuan | 1997-04-22 |