DD

David C. Darwin

WC W.R. Grace & Co.-Conn.: 9 patents #76 of 1,045Top 8%
HY Hycrete: 2 patents #9 of 13Top 70%
📍 Columbia, MD: #92 of 1,501 inventorsTop 7%
🗺 Maryland: #2,486 of 35,612 inventorsTop 7%
Overall (All Time): #420,795 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
9125403 Waterproofing and preservative compositions for organic material Philip S. Rhodes, Jason Tuerack 2015-09-08
7670415 Vapor barrier for porous structures and system David Rosenberg, John O. de Mars, Eugene B. Humphrey, Michael Rhodes, Philip S. Rhodes +4 more 2010-03-02
6139623 Emulsified comb polymer and defoaming agent composition and method of making same Robert Taylor, Ara A. Jeknavorian, Ding Feng Shen 2000-10-31
5840114 High early-strength-enhancing admixture for precast hydraulic cement and compositions containing same Ara A. Jeknavorian, Ahmad Arfaei, Neal S. Berke, Ellis Gartner, Leslie A. Jardine +2 more 1998-11-24
5753744 Cement and cement composition having improved rheological properties Ellis Gartner, Ahmad Arfaei, Xiaojia Zhang 1998-05-19
5728207 Cement admixture product having improved rheological properties and process of forming same Ahmad Arfaei, Ellis Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo 1998-03-17
5725657 Cement admixture product Ellis Gartner 1998-03-10
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
5583183 Cement and cement composition having improved rheological properties Ellis Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo 1996-12-10
5393343 Cement and cement composition having improved rheological properties Ellis Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo 1995-02-28