Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665158 | Cement admixture product | David C. Darwin | 1997-09-09 |
| 5656075 | Control of expansion in concrete due to alkali silica reaction | James M. Gaidis | 1997-08-12 |
| 5643978 | Cement admixture product having improved rheological properties and process of forming same | David C. Darwin, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo | 1997-07-01 |
| 5633298 | Cement admixture product having improved rheological properties and process of forming same | Ahmad Arfaei, David C. Darwin, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo | 1997-05-27 |