Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7255843 | Low viscosity-increment fumed-silica and its slurry | Hitoshi Kobayashi, Hirokuni Shirono | 2007-08-14 |
| 7083770 | Amorphous, fine silica particles, and method for their production and their use | Takeyoshi Shibasaki, Kazuyoshi Honda, Hirokuni Shirono | 2006-08-01 |
| 6994834 | Surface-modified fine silica powder and use thereof | Hirokuni Shirono, Yuki Amano | 2006-02-07 |
| 6677095 | Fine metal oxide powder having high dispersibility and toner composition comprising the same | Toshio Morii, Hirokuni Shirono | 2004-01-13 |
| 6224980 | Fine powder of hydrophobic titanium oxide, and method for producing it | Eiji Komai, Hirokuni Shirono | 2001-05-01 |
| 6077640 | Fine powder of hydrophobic metal oxide, method for producing it, and toner composition for electrophotography | Eiji Komai, Naruyasu Ishibashi, Hirokuni Shirono | 2000-06-20 |
| 5843525 | Surface-modified metal oxide fine particles and process for producing the same | Takeyoshi Shibasaki | 1998-12-01 |