Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7321035 | Process for producing 2,6-dihalogenopurine | Naruhito Masai, Taketo Hayashi, Hiroharu Kumazawa, Istvan Barta, Takehiko Kawakami | 2008-01-22 |
| 6936713 | Process for producing 2,6-dihalogenopurine | Naruhito Masai, Taketo Hayashi, Hiroharu Kumazawa, Istvan Barta, Takehiko Kawakami | 2005-08-30 |
| 6455696 | Process for preparing 2,6-dichloropurine | Taketo Hayashi, Hiroharu Kumazawa | 2002-09-24 |