Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6599397 | Method for preventing polymerization of (meth)acrylic acid and esters thereof and method for the production thereof | Kazuhiko Sakamoto, Tomohiro Nakae, Kazuo Okochi, Masahiro Uemura | 2003-07-29 |
| 6588450 | Storage tank for viscous oil containing easily polymerizable compounds | Yuichi Ijiri, Yukihiro Matsumoto, Fumio Munechika | 2003-07-08 |
| 6566551 | Method for preventing effluent gas pipe from blocking | Takeshi Nishimura, Yukihiro Matsumoto, Misao Inada, Harunori Hirao, Mamoru Takamura | 2003-05-20 |
| 6540881 | Method for refining (meth)acrylic acid | Kazuhiko Sakamoto, Kouji Ueno, Masatoshi Ueoka | 2003-04-01 |
| 6495045 | Solid substance removing device | Kei Hamamoto, Yukihiro Matsumoto, Naoto Kasaya, Masakatsu Mori | 2002-12-17 |
| 6482981 | Method for producing acrylic acid | Kouji Ueno, Masatoshi Ueoka | 2002-11-19 |
| 6469202 | Method for disposal of solid catalyst | Takeshi Nishimura, Masahiro Motofuji, Masatoshi Ueoka | 2002-10-22 |
| 6452040 | Production process for hydroxyalkyl (meth)acrylate | Yasuhiro Shingai, Yukihiro Yoneda, Masakazu Asami, Masatoshi Ueoka | 2002-09-17 |
| 6444744 | Hydrophilic resin, absorbent article, and acrylic acid for polymerization | Hirotama Fujimaru, Kunihiko Ishizaki, Nobuyuki Harada | 2002-09-03 |
| 6441228 | Apparatus and process for producing (meth)acrylic acid | Kazuhiko Sakamoto, Yukihiro Matsumoto, Kenji Sanada, Masatoshi Ueoka | 2002-08-27 |
| 6414183 | Method for handling waste oil | Kazuhiko Sakamoto, Masatoshi Ueoka | 2002-07-02 |
| 6372944 | Liquid withdrawing tray for purification column, purification column, and method for purification | Hajime Matsumoto, Takeshi Nishimura, Yukihiro Matsumoto, Misao Inada | 2002-04-16 |
| 6348135 | Process for the purification of (meth) acrylic acid and/or its ester | Yukihiro Matsumoto, Masatoshi Ueoka | 2002-02-19 |
| 6300513 | Method of stabilizing N-oxyl compounds in vinyl compounds | Kazuhiko Sakamoto, Naoki Serata, Kouji Ueno, Masatoshi Ueoka | 2001-10-09 |
| 6084127 | Method for recovering acrylic acid | Kazuhiko Sakamoto, Fumio Shibusawa, Takahiro Takeda, Masatoshi Ueoka | 2000-07-04 |
| 5785821 | Process for the production of acrylic acid | Kazuhiko Sakamoto, Takahiro Takeda, Masatoshi Ueoka, Yohji Akazawa | 1998-07-28 |