Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6291600 | Method of preventing scale adhesion to the surfaces of a polymerization tank | Seiichi Masuko, Yoshimatsu Naka, Keiichi Fukuda, Akira Yamamoto, Yasuyuki Hatakeyama +2 more | 2001-09-18 |
| 6174986 | Polymerization of vinyl chloride | Akihiko Takahashi, Masaaki Ozawa | 2001-01-16 |
| 5789499 | Polymerization process of vinyl chloride in the presence of oxygen | Seiichi Masuko, Yoshihiro Umeda, Katsuhito Kohketsu, Akihiko Takahashi | 1998-08-04 |
| 5780104 | Method for preventing the inner wall surfaces of the polymerization apparatus from being fouled with scale during the polymerizatioin of vinyl chloride | Akihiko Takahashi, Sunao Maeda, Yuzo Ono, Masaaki Ozawa | 1998-07-14 |
| 5728780 | Method of preventing scale adhesion to the surfaces of a polymerization tank and the like | Seiichi Masuko, Yasuyuki Hatakeyama | 1998-03-17 |
| 5674953 | Method of preventing scale adhesion to surfaces of polymerization tank with phenol-aldehyde coating | Seiichi Masuko, Keiichi Fukuda, Yasuyuki Hatakeyama, Akihiro Yamaguchi, Keizaburo Yamaguchi | 1997-10-07 |
| 5674954 | Method of preventing scale adhesion to the surfaces of a polymerization tank and the like | Seiichi Masuko, Yoshimatsu Naka, Keiichi Fukuda, Akira Yamamoto, Yasuyuki Hatakeyama | 1997-10-07 |
| 5147948 | Method for polymerizing vinyl chloride while inhibiting adhesion to the polymerization reactor with coating from poly(hydricphenol sulfide) | Seiichi Masuko, Keiichi Fukuda, Yasuyuki Hatakeyama, Akihiro Yamaguchi, Keizaburo Yamaguchi | 1992-09-15 |