Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643978 | Cement admixture product having improved rheological properties and process of forming same | David C. Darwin, Ellis Gartner, Byong-Wa Chun, Lawrence L. Kuo | 1997-07-01 |
| 5633298 | Cement admixture product having improved rheological properties and process of forming same | Ahmad Arfaei, David C. Darwin, Ellis Gartner, Byong-Wa Chun, Lawrence L. Kuo | 1997-05-27 |