Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6486260 | Cement additive, cement composition and polycarboxylic acid polymer | Tsutomu Yuasa, Hirokatsu Kawakami | 2002-11-26 |
| 6454850 | Cement admixture and cement composition comprising this | Akihiko Yamashita, Hiroshi Mitsukawa | 2002-09-24 |
| 6388038 | Method for producing polycarboxylic acid for cement dispersant and cement composition | Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare, Syogo Iwai | 2002-05-14 |
| 6384141 | Anti-shrinkage agent for hydraulic material | Koichiro Nagare | 2002-05-07 |
| 6376581 | Cement dispersant, method for production thereof, and cement composition using the dispersant | Yoshio Tanaka, Akira Ohta, Toru Uno, Tsutomu Yuasa, Hideyuki Tahara | 2002-04-23 |
| 6362364 | Method for production of esterified product and apparatus therefor | Hiromichi Tanaka, Tsutomu Yuasa | 2002-03-26 |