ALFRED T. WALKER

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OXFORD, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Lead-free resistive composition
- Patent number 8,257,619
- Issue date Sep 4, 2012
- E I du Pont de Nemours and Company
- Marc H. Labranche
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Non-lead resistor composition
- Patent number 8,226,857
- Issue date Jul 24, 2012
- E. I. Du Pont de Nemours and Company
- Paul Douglas Vernooy
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Non-lead resistor composition
- Patent number 7,951,311
- Issue date May 31, 2011
- E. I. Du Pont de Nemours and Company
- Paul Douglas Vernooy
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Non-lead resistor composition
- Patent number 7,608,206
- Issue date Oct 27, 2009
- E. I. DuPont de Nemours and Company
- Paul Douglas VerNooy
- C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

Information Patent Application
NON-LEAD RESISTOR COMPOSITION
- Publication number 20110227003
- Publication date Sep 22, 2011
- E.I. du Pont de Nemours and Company
- PAUL DOUGLAS VERNOOY
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
LEAD-FREE RESISTIVE COMPOSITION
- Publication number 20110089381
- Publication date Apr 21, 2011
- E.I. du Pont de Nemours and Company
- Marc H. Labranche
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
NON-LEAD RESISTOR COMPOSITION
- Publication number 20100040531
- Publication date Feb 18, 2010
- E.I. du Pont de Nemours and Company
- PAUL DOUGLAS VERNOOY
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
NON-LEAD RESISTOR COMPOSITION
- Publication number 20090261306
- Publication date Oct 22, 2009
- Paul Douglas VerNooy
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES