Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9255013 | Method for producing hematite for ironmaking | Hideki Sasaki, Manabu Enomoto, Hirofumi Shouji, Tatsuya Higaki, Hiroyuki Mitsui +1 more | 2016-02-09 |
| 9017640 | Method for producing high-purity nickel surface | Takayuki Nakai, Tatsuya Higaki | 2015-04-28 |
| 8911531 | Hydrometallurgical plant of nickel laterite ore and operation method thereof | Osamu Nakai, Toru Kitazaki, Shinichi Heguri, Keisuke Shibayama | 2014-12-16 |
| 8747787 | Method for producing raw material for ferronickel smelting from low grade nickel oxide ore | Hiroshi Kobayashi, Osamu Nakai, Keisuke Shibayama, Takayuki Nakai, Norihisa Toki +2 more | 2014-06-10 |
| 8343447 | Hydrometallurgical process for a nickel oxide ore | Keisuke Shibayama, Osamu Nakai | 2013-01-01 |
| 7964165 | Separation method for zinc sulfide | Osamu Nakai, Keisuke Shibayama, Takao Ooishi, Satoshi Matsumoto | 2011-06-21 |
| 7563421 | Hydrometallurgical process of nickel oxide ore | Hiroshi Kobayashi, Hirofumi Shouji, Masaki Imamura, Naoyuki Tsuchida | 2009-07-21 |
| 7018605 | Sulfidation reaction control method | Hiroshi Kobayashi, Masaki Imamura | 2006-03-28 |
| 6149885 | Method for purifying a nickel sulfate solution by solvent extraction | Susumu Makino, Naoyuki Tsuchida, Atsushi Goda, Sunao Kanesaka, Masaki Imamura +1 more | 2000-11-21 |
| 5888462 | Method of solvent extraction of nickel sulfate solutions | Susumu Makino, Naoyuki Tsuchida, Masaki Imamura, Kazuyuki Takaishi | 1999-03-30 |