Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5350450 | Admixture for concrete mixes | Kenkichi Hamabe, Shigemi Matsuo, Hideo Ogawa, Minoru Ueda | 1994-09-27 |
| 5236501 | Method for producing a cementitious composition in powder form | Hiroshi Yokoyama, Shigeki Yoshida, Yoshiro Yoshizaki | 1993-08-17 |
| 5085708 | Lignosulfonates, oxycarboxylates, polycarboxylates, and polyoxalklene, alkylaryl and alkyl ethers admixtures for ultra-dry mix concrete | Yoshitaka Moriya, Makoto Takada, Yukihide Takatsu, Kenichi Umezawa | 1992-02-04 |
| 4977227 | Lignosulfonic graft copolymer as a cement dispersant | Shin'ichi Negami, Toru Nemoto, Yoshio Tanaka, Akira Ohta | 1990-12-11 |