Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7935171 | Production of metallic nickel with low iron content | Ivan Ratchev, Houyuan Liu, Harald Theowald Muller | 2011-05-03 |
| 7871584 | Consecutive or simultaneous leaching of nickel and cobalt containing ores | Houyuan Liu, Wolf Meihack | 2011-01-18 |
| 7597738 | Production of ferro-nickel or nickel matte by a combined hydrometallurgical and pyrometallurgical process | Houyuan Liu, Wolf Meihack, Ivan Ratchev | 2009-10-06 |
| 7585350 | Production of ferronickel | Houyuan Liu, Ivan Ratchev | 2009-09-08 |