David J. Derwin

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Prospect Heights, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Drilling fluid additive for loss circulation and wellbore strengthe...
- Patent number 8,999,898
- Issue date Apr 7, 2015
- Superior Graphite Co.
- Changjun Zhou
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Cement compositions including resilient graphitic carbon fraction
- Patent number 8,617,309
- Issue date Dec 31, 2013
- Superior Graphite Co.
- Peter Roy Carney
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Engineered carbonaceous materials and power sources using these mat...
- Patent number 6,660,434
- Issue date Dec 9, 2003
- Superior Graphite Co.
- Igor V. Barsukov
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method for expanding lamellar forms of graphite and resultant product
- Patent number 6,287,694
- Issue date Sep 11, 2001
- Superior Graphite Co.
- Peter L. Zaleski
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Drilling fluid loss prevention and lubrication additive
- Patent number 5,826,669
- Issue date Oct 27, 1998
- Superior Graphite Co.
- Peter L. Zaleski
- E21 - EARTH DRILLING MINING
Information Patent Grant
Electrically conductive paving mixture and pavement system
- Patent number 5,707,171
- Issue date Jan 13, 1998
- Peter L. Zaleski
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
DRILLING FLUID ADDITIVE FOR LOSS CIRCULATION AND WELLBORE STRENGTHE...
- Publication number 20140274816
- Publication date Sep 18, 2014
- SUPERIOR GRAPHITE CO.
- Changjun Zhou
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
Electrically conductive pavement mixture
- Publication number 20040062606
- Publication date Apr 1, 2004
- Peter L. Zaleski
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
Engineered carbonaceous materials and power sources using these mat...
- Publication number 20040048162
- Publication date Mar 11, 2004
- Igor V. Barsukov
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Engineered carbonaceous materials and power sources using these mat...
- Publication number 20010041293
- Publication date Nov 15, 2001
- Igor V. Barsukov
- H01 - BASIC ELECTRIC ELEMENTS