Issued Patents All Time
Showing 1–25 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9062140 | Polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin | Hirotama Fujimaru, Kunihiko Ishizaki | 2015-06-23 |
| 7534339 | Reactor filled with solid particle and gas-phase catalytic oxidation with the reactor | Yukihiro Matsumoto, Takeshi Nishimura, Naoto Kasaya | 2009-05-19 |
| 7326810 | Method for starting up reactor | Harunori Hirao, Yukihiro Matsumoto, Kunihiko Suzuki | 2008-02-05 |
| 7326811 | Method for production of (meth)acrylic acid by use of a shell-and-tube heat exchanger | Tetsuji Mitsumoto, Takeshi Nishimura, Osamu Dodo | 2008-02-05 |
| 7319167 | Method for distilling (meth)acrylic acid and/or the ester thereof | Kazuhiko Sakamoto, Yukihiro Matsumoto | 2008-01-15 |
| 7282118 | Method for production of easily polymerizable substance and purification apparatus | Tetsuji Mitsumoto, Takeshi Nishimura, Hidefumi Haramaki | 2007-10-16 |
| 7147048 | Shell-and-tube type heat exchanger and method for production of (meth) acrylic acid by use of the exchange | Tetsuji Mitsumoto, Takeshi Nishimura, Osamu Dodo | 2006-12-12 |
| 7048834 | Method for purification of acrylic acid | Yoshitake Ishii, Kouji Ueno, Kazuhiko Sakamoto, Masatoshi Ueoka, Tetsuji Mitsumoto +3 more | 2006-05-23 |
| 7049366 | Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin | Kunihiko Ishizaki, Hirotama Fujimaru, Yasuhisa Nakashima, Kazuhiko Sakamoto | 2006-05-23 |
| 7038081 | Method for producing polyacrylic acid | Yukihiro Matsumoto, Kunihiko Ishizaki | 2006-05-02 |
| 6966973 | Apparatus and process for producing (meth)acrylic acid | Kazuhiko Sakamoto, Yukihiro Matsumoto, Kenji Sanada, Masatoshi Ueoka | 2005-11-22 |
| 6891061 | Packed column and polymerizable compound treating method using the same | Takeshi Nishimura, Yukihiro Matsumoto, Osamu Dodo | 2005-05-10 |
| 6848501 | Method for preventing plate type heat exchanger from blockage | Harunori Hirao, Yukihiro Matsumoto, Osamu Dodo, Tetsuji Mitsumoto, Takeshi Nishimura +2 more | 2005-02-01 |
| 6787001 | Method for distilling (meth) acrylic acid solution | Kazuhiko Sakamoto, Yukihiro Matsumoto, Kenji Sanada, Masatoshi Ueoka | 2004-09-07 |
| 6736200 | Heat-exchanging method for easily polymerizable compound | Kazuto OKAZAKI, Yukihiro Matsumoto, Hiroo Iwato | 2004-05-18 |
| 6695928 | Method for production of (meth) acrylic acid and/or (meth)acrylic esters | Takeshi Nishimura, Masatoshi Ueoka | 2004-02-24 |
| 6676808 | Method for starting up distilling column | Kei Hamamoto, Yukihiro Matsumoto, Misao Inada | 2004-01-13 |
| 6664418 | Method for inhibiting polymerization of a vinyl compound | Kazuhiko Sakamoto, Kazuo Ohkouchi, Masahiro Uemura, Masatoshi Ueoka | 2003-12-16 |
| 6660881 | Process for producing (meth)acrylic ester | Hajime Matsumoto, Tetsuya Kajihara, Yasuhiro Shingai, Masatoshi Ueoka, Yukihiro Yoneda +2 more | 2003-12-09 |
| 6657079 | Method for mixing gases and apparatus therefor | Tetsuji Mitsumoto, Tatsuaki Yoshimura, Takeshi Nishimura | 2003-12-02 |
| 6651731 | Method for cooling heating grade heat exchanger in unsteady state | Takeshi Nishimura, Yukihiro Matsumoto, Motomi Nakamura | 2003-11-25 |
| 6649028 | Column treating process and apparatus thereof | Kazuhiko Sakamoto, Masatoshi Ueoka, Naoto Kasaya | 2003-11-18 |
| 6649787 | Method for preparing (meth) acrylic acid ester | Masatoshi Ueoka | 2003-11-18 |
| 6642414 | Method for production of (meth) acrylic acid | Tetsuji Mitsumoto, Yukihiro Matsumoto, Tatsuaki Yoshimura | 2003-11-04 |
| 6613196 | Method for stopping purifying column | Kei Hamamoto, Yukihiro Matsumoto, Misao Inada | 2003-09-02 |