Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5981070 | Water-absorbent agent powders and manufacturing method of the same | Kunihiko Ishizaki, Nobuyuki Harada | 1999-11-09 |
| 5866678 | Absorbent and method for production of absorbent resin | Katsuhiro Kajikawa, Yoshihiko Masuda | 1999-02-02 |
| 5797893 | Absorbing agent composition, absorbent material, and absorbent product containing absorbent material | Katsuyuki Wada, Kunihiko Ishizaki | 1998-08-25 |
| 5760080 | Absorbing agent, process of manufacturing same, and absorbent product containing same | Katsuyuki Wada, Shin-ichi Fujino, Yoshihiko Masuda | 1998-06-02 |
| 5610208 | Water-absorbent agent, method for production thereof, and water-absorbent composition | Yorimichi Dairoku, Yoshihiko Masuda, Nobuyuki Harada, Yoshihiro Motono, Kunihiko Ishizaki | 1997-03-11 |
| 5574121 | Process for preparing an absorbent resin crosslinked with a mixture of trimethylolpropane diacrylate and triacrylate | Yoshio Irie, Nobuyuki Harada, Kohichi Hirota, Yoshihiko Masuda, Hideaki Nagano +1 more | 1996-11-12 |
| 5532323 | Method for production of absorbent resin | Kazutaka Yano, Katsuhiro Kajikawa, Yoshio Irie | 1996-07-02 |
| 5478879 | Method for production of absorbent resin | Katsuhiro Kajikawa, Yoshihiko Masuda, Yoshio Irie | 1995-12-26 |
| 5475062 | Method for surface treatment of absorbent resin | Kunihiko Ishizaki, Shin-ichi Fujino, Yoshiniko Masuda | 1995-12-12 |
| 5422405 | Method for production of absorbent resin | Yorimichi Dairoku, Kazutaka Yano, Toru Yanase, Yoshihiko Masuda | 1995-06-06 |
| 5389722 | Hydrophilic resin and method for production thereof | Kunihiko Ishizaki | 1995-02-14 |
| 5244735 | Water-absorbent resin and production process | Kazumasa Kimura, Takashi Namba, Kenji Kadonaga, Koji Miyake, Tadao Shimomura | 1993-09-14 |
| 5229488 | Method for manufacture of an absorbent resin | Katsuhiro Kajikawa, Takumi Hatsuda, Yoshio Irie, Teruaki Fujiwara | 1993-07-20 |
| 5164459 | Method for treating the surface of an absorbent resin | Kazumasa Kimura, Takumi Hatsuda | 1992-11-17 |
| 5140076 | Method of treating the surface of an absorbent resin | Takumi Hatsuda, Kazumasa Kimura, Akito Yano | 1992-08-18 |
| 5026800 | Water-absorbent resin and production process | Kazumasa Kimura, Takashi Namba, Kenji Kadonaga, Koji Miyake, Tadao Shimomura | 1991-06-25 |
| 4973632 | Production process for water-absorbent resin | Takashi Namba, Koji Miyake, Kazumasa Kimura, Tadao Shimomura | 1990-11-27 |