Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6451862 | Process for producing a spherical silica gel | Makoto Kusaka, Hachiro Hirano, Masaharu Tanaka | 2002-09-17 |
| 6267942 | Method for producing spherical silica particles | Makoto Kusaka, Hachiro Hirano | 2001-07-31 |
| 5756001 | High concentration alumina sol of low viscosity | Hachirou Hirano, Masaharu Tanaka, Kunihiko Terase | 1998-05-26 |
| 5738718 | Zinc oxide-containing spherical silica and process for its production | Hiroshi Funaki, Kunihiko Terase, Hachirou Hirano | 1998-04-14 |
| 5582818 | Ultraviolet screening powder and cosmetics | Noriyuki Nakanishi | 1996-12-10 |