David R. Prengaman

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Corrosion resistant positive grid for lead-acid batteries
- Patent number 10,637,044
- Issue date Apr 28, 2020
- NorthStar Battery Company, LLC
- Frank A Fleming
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Corrosion resistant positive grid for lead-acid batteries
- Patent number 9,985,276
- Issue date May 29, 2018
- NorthStar Battery Company, LLC
- Frank A Fleming
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Lead-tin-silver-bismuth containing alloy for positive grid of lead...
- Patent number 7,923,155
- Issue date Apr 12, 2011
- NorthStar Battery Company, LLC
- David R. Prengaman
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Alloy and anode for use in the electrowinning of metals
- Patent number 7,704,452
- Issue date Apr 27, 2010
- RSR Technologies, Inc.
- David R. Prengaman
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
Corrosion Resistant Positive Grid for Lead-Acid Batteries
- Publication number 20180248171
- Publication date Aug 30, 2018
- NorthStar Battery Company, LLC
- Frank A. Fleming
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Corrosion Resistant Positive Grid for Lead-Acid Batteries
- Publication number 20150125748
- Publication date May 7, 2015
- NorthStar Battery Company, LLC
- Frank A. Fleming
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Lead-Tin-Silver-Bismuth Containing Alloy for Positive Grid of Lead...
- Publication number 20080233482
- Publication date Sep 25, 2008
- NorthStar Battery Company LLC
- David R. Prengaman
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Alloy and anode for use in the electrowinning of metals
- Publication number 20070193879
- Publication date Aug 23, 2007
- David R. Prengaman
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR