Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6486260 | Cement additive, cement composition and polycarboxylic acid polymer | Hirokatsu Kawakami, Tsuyoshi Hirata | 2002-11-26 |
| 6388038 | Method for producing polycarboxylic acid for cement dispersant and cement composition | Tsuyoshi Hirata, Katsuhisa Shiote, Koichiro Nagare, Syogo Iwai | 2002-05-14 |
| 6376581 | Cement dispersant, method for production thereof, and cement composition using the dispersant | Yoshio Tanaka, Akira Ohta, Tsuyoshi Hirata, Toru Uno, Hideyuki Tahara | 2002-04-23 |
| 6362364 | Method for production of esterified product and apparatus therefor | Tsuyoshi Hirata, Hiromichi Tanaka | 2002-03-26 |