Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5811527 | Lignin composition, method of producing the same and dispersing agent for cement used the same | Hideaki Ishitoku, Masanobu Kawamura, Tomoyuki Nakamoto | 1998-09-22 |
| 5233012 | Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon | Masanobu Kawamura, Shinji Hamada, Takashi Date, 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, Shinji Hamada, Takashi Date, Nobuhiro Hanada | 1992-10-06 |
| 4367094 | Slump reduction-preventing agent and method for improving applicability of mortar concrete | Yukio Fujimaru, Keiji Ueoka, Shigenobu Fujioka | 1983-01-04 |