Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388038 | Method for producing polycarboxylic acid for cement dispersant and cement composition | Tsuyoshi Hirata, Tsutomu Yuasa, Koichiro Nagare, Syogo Iwai | 2002-05-14 |
| 6174980 | Cement dispersant, method for producing polycarboxylic acid for cement dispersant and cement composition | Tsuyoshi Hirata, Tsutomu Yuasa, Koichiro Nagare, Syogo Iwai | 2001-01-16 |
| 6048916 | Method for dispersion of cement | Tsuyoshi Hirata, Tsutomu Yuasa, Shogo Iwai, Koichiro Nagare, Hideyuki Tahara | 2000-04-11 |
| 5912284 | Cement additive, its production process and use | Tsuyoshi Hirata, Tsutomu Yuasa, Syogo Iwai, Koichiro Nagare | 1999-06-15 |