Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10442715 | Chromium-containing water treatment method | Hiroyuki Mitsui, Osamu Nakai, Sho Shirai | 2019-10-15 |
| 10017835 | Method for producing nickel sulfide and hydrometallurgical method for nickel oxide ore | Shinichiro Nakamura, Osamu Nakai, Hiroyuki Mitsui | 2018-07-10 |
| 9719153 | Method for shortening operation shutdown time of high pressure acid leach equipment in a hydrometallurgical process | Osamu Nakai, Yoshitomo Ozaki | 2017-08-01 |
| 9561972 | Method for effluent treatment in smelting of nickel oxide ore | Yasuo Yoshii, Yoji Kyoda, Yoshitomo Ozaki, Osamu Nakai, Hiroyuki Mitsui | 2017-02-07 |
| 9410226 | Ore slurry production method and metal refining method | Hiroyuki Mitsui, Hirofumi Shoji, Tatsuya Higaki, Yoji Kyoda, Osamu Nakai | 2016-08-09 |
| 8911531 | Hydrometallurgical plant of nickel laterite ore and operation method thereof | Osamu Nakai, Toru Kitazaki, Shinichi Heguri, Yoshitomo Ozaki | 2014-12-16 |
| 8747787 | Method for producing raw material for ferronickel smelting from low grade nickel oxide ore | Hiroshi Kobayashi, Osamu Nakai, Takayuki Nakai, Yoshitomo Ozaki, Norihisa Toki +2 more | 2014-06-10 |
| 8716177 | Production process of sulfide containing nickel and cobalt | Satoshi Matsumoto | 2014-05-06 |
| 8343447 | Hydrometallurgical process for a nickel oxide ore | Yoshitomo Ozaki, Osamu Nakai | 2013-01-01 |
| 7964165 | Separation method for zinc sulfide | Osamu Nakai, Yoshitomo Ozaki, Takao Ooishi, Satoshi Matsumoto | 2011-06-21 |