Derwin; David J.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Derwin; David J..The latest application filed is for "drilling fluid additive for loss circulation and wellbore strengthening".

Company Profile

0.8.4

Derwin; David J. - Prospect Heights IL
Derwin, David J. - Prospects Heights IL
Derwin; David J. - Des Plaines IL

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Drilling fluid additive for loss circulation and wellbore strengthening Grant 8,999,898 - Zhou , et al. April 7, 2	2015-04-07
Drilling Fluid Additive For Loss Circulation And Wellbore Strengthening App 20140274816 - Zhou; Changjun ; et al.	2014-09-18
Cement compositions including resilient graphitic carbon fraction Grant 8,617,309 - Carney , et al. December 31, 2	2013-12-31
Electrically conductive pavement mixture Grant RE43,044 - Zaleski , et al. December 27, 2	2011-12-27
Electrically conductive pavement mixture Grant 6,971,819 - Zaleski , et al. December 6, 2	2005-12-06
Electrically conductive pavement mixture App 20040062606 - Zaleski, Peter L. ; et al.	2004-04-01
Engineered carbonaceous materials and power sources using these materials App 20040048162 - Barsukov, Igor V. ; et al.	2004-03-11
Engineered carbonaceous materials and power sources using these materials Grant 6,660,434 - Barsukov , et al. December 9, 2	2003-12-09
Engineered carbonaceous materials and power sources using these materials App 20010041293 - Barsukov, Igor V. ; et al.	2001-11-15
Method for expanding lamellar forms of graphite and resultant product Grant 6,287,694 - Zaleski , et al. September 11, 2	2001-09-11
Drilling fluid loss prevention and lubrication additive Grant 5,826,669 - Zaleski , et al. October 27, 1	1998-10-27
Electrically conductive paving mixture and pavement system Grant 5,707,171 - Zaleski , et al. January 13, 1	1998-01-13

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