DD

David J. Derwin

SG Superior Graphite: 7 patents #3 of 28Top 15%
Overall (All Time): #647,696 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8999898 Drilling fluid additive for loss circulation and wellbore strengthening Changjun Zhou, Frank A. Wawrzos 2015-04-07
8617309 Cement compositions including resilient graphitic carbon fraction Peter R. Carney, Craig Allen Baer, Changjun Zhou, Frank A. Wawrzos, Marcin Tlustochowicz 2013-12-31
RE43044 Electrically conductive pavement mixture Peter L. Zaleski, Walter H. Flood, Jr. 2011-12-27
6971819 Electrically conductive pavement mixture Peter L. Zaleski, Walter H. Flood, Jr. 2005-12-06
6660434 Engineered carbonaceous materials and power sources using these materials Igor V. Barsukov, Peter L. Zaleski, Richard J. Girkant, Maritza Gallego 2003-12-09
6287694 Method for expanding lamellar forms of graphite and resultant product Peter L. Zaleski, Richard J. Girkant 2001-09-11
5826669 Drilling fluid loss prevention and lubrication additive Peter L. Zaleski, Donald J. Weintritt, George W. Russell 1998-10-27
5707171 Electrically conductive paving mixture and pavement system Peter L. Zaleski, Walter H. Flood, Jr. 1998-01-13