Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8728229 | Cement slurry composition | Koji Koyanagi, Toshiharu Kojima | 2014-05-20 |
| 8648120 | Liquid rheology modifier | Koji Koyanagi, Toshiharu Kojima | 2014-02-11 |
| 8105500 | Slurry rheology modifier | Koji Koyanagi, Daisuke Shiba | 2012-01-31 |
| 7846876 | Surfactant composition | Koji Koyanagi, Sadahara Miyamoto | 2010-12-07 |
| 7501021 | Rheology modifier | Koji Koyanagi, Fujio Yamato, Toshiharu Kojima | 2009-03-10 |
| 7374699 | Slurry rheology modifier | Koji Koyanagi, Daisuke Shiba | 2008-05-20 |
| 6068697 | Polysaccharide derivatives and hydraulic compositions | Takeshi Ihara, Tomohito Kitsuki, Tetsuya Miyajima, Fujio Yamato, Makoto Kohama | 2000-05-30 |
| 5720807 | Hydraulic composition and process for preparing the same | Tatsuo Izumi, Shin Murahara, Akira Kurara | 1998-02-24 |
| 5674316 | Hydraulic composition | Tatsuo Izumi, Shin Murahara, Takaaki Tadokoro | 1997-10-07 |