DD

David C. Darwin

WC W.R. Grace & Co.-Conn.: 3 patents #9 of 126Top 8%
📍 Columbia, MD: #2 of 82 inventorsTop 3%
🗺 Maryland: #61 of 1,889 inventorsTop 4%
Overall (1997): #17,325 of 185,788Top 10%
3
Patents 1997

Issued Patents 1997

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5665158 Cement admixture product Ellis Gartner 1997-09-09
5643978 Cement admixture product having improved rheological properties and process of forming same Ellis Gartner, 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, Ellis Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo 1997-05-27