Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7345170 | Crystal and solvate of 2-amino-6-benzyloxypurine and production methods thereof | Takehiko Kawakami, Yoshihiko Iwanaga, Yosuke Watanabe | 2008-03-18 |
| 7321035 | Process for producing 2,6-dihalogenopurine | Naruhito Masai, Hiroharu Kumazawa, Junichi Nishikawa, Istvan Barta, Takehiko Kawakami | 2008-01-22 |
| 7307167 | Production method of 2,6-dihalopurine | Hiroharu Kumazawa, Takehiko Kawakami | 2007-12-11 |
| 6936713 | Process for producing 2,6-dihalogenopurine | Naruhito Masai, Hiroharu Kumazawa, Junichi Nishikawa, Istvan Barta, Takehiko Kawakami | 2005-08-30 |
| 6455696 | Process for preparing 2,6-dichloropurine | Hiroharu Kumazawa, Junichi Nishikawa | 2002-09-24 |
| 6342603 | Purine derivatives having cyclopropane ring | Junichi Yasuoka, Akito Nishiura | 2002-01-29 |
| 6156892 | Purine derivatives having cyclopropane ring | Junichi Yasuoka, Akito Nishiura | 2000-12-05 |
| 5994541 | Process for producing 2-amino-6-iodopurine | Kenji Nishiwaki, Masaaki Kuwata | 1999-11-30 |
| 5902899 | Process for preparing 1, 3-disubstituted urea | Junichi Yasuoka | 1999-05-11 |
| 5508446 | Method for producing alkyl 3-phthalidylideneacetate | — | 1996-04-16 |
| 5440037 | Method for production of 2-amino-6-halogenopurine derivatives | Masami Igi | 1995-08-08 |
| 5391733 | Synthesis intermediates for 2-amino-6-halogenopurines | Masami Igi | 1995-02-21 |
| 5389637 | 2-formylamino-6-halogenopurine | Masami Igi | 1995-02-14 |