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David J. Roha
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Greensburg, PA, US
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Patents Grants
last 30 patents
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Patent Grant
Use of alumina-carbon agglomerates in the carbothermic production o...
Patent number
7,819,937
Issue date
Oct 26, 2010
Alcoa Inc.
Richard J. Fruehan
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
Use of alumina-carbon agglomerates in the carbothermic production o...
Patent number
7,753,988
Issue date
Jul 13, 2010
Alcoa Inc.
Richard J. Fruehan
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Fuel cell aluminum production
Patent number
6,117,302
Issue date
Sep 12, 2000
Aluminum Company of America
David J. Roha
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Patents Applications
last 30 patents
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Patent Application
TREATMENT OF BAUXITE RESIDUE AND SPENT POT LINING
Publication number
20110081284
Publication date
Apr 7, 2011
Mark WEAVER
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
USE OF ALUMINA-CARBON AGGLOMERATES IN THE CARBOTHERMIC PRODUCTION O...
Publication number
20100107815
Publication date
May 6, 2010
ALCOA INC.
Richard J. Fruehan
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
USE OF ALUMINA-CARBON AGGLOMERATES IN THE CARBOTHERMIC PRODUCTION O...
Publication number
20090013823
Publication date
Jan 15, 2009
ALCOA INC.
Richard J. Fruehan
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
Inert anode designs for reduced operating voltage of aluminum produ...
Publication number
20040163967
Publication date
Aug 26, 2004
Alfred F. LaCamera
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR