Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877907 | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Tohru Miura, Teruyuki Nagata, Koju Okazaki, Emiko Nishida | 1989-10-31 |
| 4873374 | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Tohru Miura, Teruyuki Nagata, Koju Okazaki, Emiko Nishida | 1989-10-10 |
| 4851590 | Method of purifying 2,4-xylenol | Tohru Miura, Katsuju Watanabe, Hitoshi Nakayama, Teruyuki Nagata | 1989-07-25 |