Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5233012 | Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon | Masanobu Kawamura, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada | 1993-08-03 |
| 5153299 | Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon | Masanobu Kawamura, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada | 1992-10-06 |