Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6809053 | Method for reactivating sulfonated resin catalyst | Hiroshi Nakayama, Masao Maruyama, Susumu Ueno | 2004-10-26 |
| 6737538 | Purification of silicone oil | Hiroshi Nakayama, Masao Maruyama, Susumu Ueno | 2004-05-18 |