Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9187579 | Particle-shaped water absorbing agent and method for producing the same | Hiroyuki Ikeuchi, Makoto Nagasawa, Kazuhiko Sakamoto, Shigeru Sakamoto, Kazushi Torii +1 more | 2015-11-17 |
| 9062140 | Polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin | Kunihiko Ishizaki, Sei Nakahara | 2015-06-23 |
| 8822373 | Particulate water absorbing agent and production method thereof | Eri Nagasawa, Masatoshi Nakamura, Hiroyuki Ikeuchi, Makoto Nagasawa, Ryoko Tahara | 2014-09-02 |
| 8765857 | Particulate water retaining material for cultivating plant having water absorbent resin as main component | Yorimichi Dairoku, Kunihiko Ishizaki, Yoshifumi Adachi, Nobuyuki Harada | 2014-07-01 |
| 8729191 | Production process of polyacrylic acid (salt) water-absorbent resin | Takaaki Kawano, Kunihiko Ishizaki, Katsuyuki Wada | 2014-05-20 |
| 8552134 | Method of producing polyacrylic acid (salt) water-absorbent resin | Eri Goto, Kunihiko Ishizaki, Atsushi Motoyama | 2013-10-08 |
| 8481664 | Particulate water absorbing agent including polyacrylic acid (polyacrylate) based water absorbing resin as a principal component, method for production thereof, water-absorbent core and absorbing article in which the particulate water absorbing agent is used | Yorimichi Dairoku, Kunihiko Ishizaki | 2013-07-09 |
| 7435477 | Particulate water absorbent containing water absorbent resin as a main component | Yoshifumi Adachi, Takahiro Kitano, Hiroyuki Ikeuchi, Katsuyuki Wada | 2008-10-14 |
| 7282262 | Particulate water absorbent containing water absorbent resin as a main component | Yoshifumi Adachi, Takahiro Kitano, Kozo Nogi | 2007-10-16 |
| 7196139 | Water-absorbent resin composition | Katsuyuki Wada, Kunihiko Ishizaki, Motohiro Imura, Hiroki Inoue | 2007-03-27 |
| 7049366 | Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin | Sei Nakahara, Kunihiko Ishizaki, Yasuhisa Nakashima, Kazuhiko Sakamoto | 2006-05-23 |
| 6822010 | Method for production of porous material | Hiroki Inoue, Kenji Kadonaga, Kinya Nagasuna | 2004-11-23 |
| 6797735 | Process for producing porous polymer | Kinya Nagasuna, Kenji Kadonaga, Kozo Nogi, Kenji Minami | 2004-09-28 |
| 6730711 | Method for production of porous cross-linked polymer material | Masazumi Sasabe, Kenji Kadonaga, Hiroki Inoue, Akiko Mitsuhashi, Masatoshi Yoshida +2 more | 2004-05-04 |
| 6727345 | Continuous production process for water-absorbent resin powder and powder surface detector used therefor | Katsuhiro Kajikawa, Toru Nishioka, Kunihiko Ishizaki | 2004-04-27 |
| 6716894 | Water-absorbent resin powder and its production process and uses | Katsuhiro Kajikawa, Toru Nishioka, Kunihiko Ishizaki | 2004-04-06 |
| 6630519 | Process for producing porous polymer | Kenji Kadonaga, Kinya Nagasuna, Kenji Minami | 2003-10-07 |
| 6444744 | Hydrophilic resin, absorbent article, and acrylic acid for polymerization | Kunihiko Ishizaki, Nobuyuki Harada, Sei Nakahara | 2002-09-03 |
| 6395793 | Method for production of porous material | Kenji Kadonaga, Akiko Mitsuhashi, Masazumi Sasabe, Kazutomo Takahashi, Masuji Izubayashi | 2002-05-28 |
| 6395792 | Method for production of porous cross-linked poymer | Kinya Nagasuna, Kenji Kadonaga, Kozo Nogi, Katsuhiko Sakamoto, Masazumi Sasabe +1 more | 2002-05-28 |
| 6323250 | Method for production of porous material | Kenji Kadonaga, Akiko Mitsuhashi, Masazumi Sasabe, Kazutomo Takahashi, Masuji Izubayashi | 2001-11-27 |
| 6274638 | Method for production of porous cross-linked polymer material | Koichi Yonemura, Hiroshi Yamazaki, Masazumi Sasabe, Kinya Nagasuna | 2001-08-14 |
| 6187872 | Water-absorbent agent and method for manufacturing the same | Toru Yanase, Kazuki Kimura, Shin-ichi Fujino, Kinya Nagasuna, Kunihiko Ishizaki +1 more | 2001-02-13 |
| 6184433 | Pressure-resistant absorbent resin, disposable diaper using the resin, and absorbent resin, and method for production thereof | Nobuyuki Harada, Kunihiko Ishizaki, Toshimasa Kitayama | 2001-02-06 |
| 6166097 | Method for production of porous material | Koichi Yonemura, Naoko Ikushima, Kazutomo Takahashi | 2000-12-26 |