Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360857 | Polymer scale preventive agent from naphthoquinone dye | Hajime Kitamura, Mikio Watanabe, Masahiro Usuki, Toshihiko Nakano | 1994-11-01 |
| 5354817 | Polymer scale preventive agent, polymerization vessel effective in preventing polymer scale deposition and process for preparation of polymer | Masahiro Usuki, Hajime Kitamura, Mikio Watanabe, Richard W. Armentrout, Thomas J. Pollock | 1994-10-11 |
| 5292834 | Method of preventing polymer scale deposition | Mikio Watanabe, Masahiro Usuki | 1994-03-08 |