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John P. Hager
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Golden, CO, US
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Patents Grants
last 30 patents
Information
Patent Grant
Process for the production of iron carbide from iron oxide using ex...
Patent number
6,428,763
Issue date
Aug 6, 2002
Iron Carbide Holdings, Ltd.
Frank M. Stephens
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Method for reducing lead leaching in fixtures
Patent number
5,904,783
Issue date
May 18, 1999
Hazen Research, Inc.
John P. Hager
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Method for controlling the conversion of iron-containing reactor fe...
Patent number
5,366,897
Issue date
Nov 22, 1994
Iron Carbide Holdings, Ltd.
John P. Hager
C21 - METALLURGY OF IRON
Information
Patent Grant
Iron as a co-additive in refining crude lead bullion
Patent number
5,223,021
Issue date
Jun 29, 1993
E. I. Du Pont de Nemours and Company
Michael H. Blenk
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Iron and a copper speiss as co-additives in refining crude lead bul...
Patent number
5,183,497
Issue date
Feb 2, 1993
E. I. Du Pont de Nemours and Company
Michael H. Blenk
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Copper speiss as a co-additive in refining crude lead bullion
Patent number
5,183,496
Issue date
Feb 2, 1993
E. I. Du Pont de Nemours and Company
Michael H. Blenk
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for preheating iron-containing reactor feed prior to being...
Patent number
5,137,566
Issue date
Aug 11, 1992
Iron Carbide Holdings, Limited
Frank M. Stephens
C21 - METALLURGY OF IRON
Information
Patent Grant
Process for using fluidized bed reactor
Patent number
5,118,479
Issue date
Jun 2, 1992
Iron Carbide Holdings, Limited
Frank M. Stephens
C21 - METALLURGY OF IRON
Information
Patent Grant
Process for the recovery and separation of arsenic from antimony
Patent number
5,110,353
Issue date
May 5, 1992
ASARCO Incorporated
Taie Li
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Treatment of indium dusts
Patent number
5,108,497
Issue date
Apr 28, 1992
Indium Corporation of America
Nicholas B. Gomez
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for controlling the product quality in the conversion of re...
Patent number
5,073,194
Issue date
Dec 17, 1991
Iron Carbide Holdings, Limited
Frank A. Stephens
C21 - METALLURGY OF IRON
Information
Patent Grant
Process for the recovery and separation of arsenic from antimony
Patent number
4,808,221
Issue date
Feb 28, 1989
ASARCO Incorporated
Thomas P. Clement
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Recovery of alumina values from alunite ore
Patent number
4,618,480
Issue date
Oct 21, 1986
Resource Technology Associates
Wayne W. Hazen
C01 - INORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
Method for producing tungsten carbide
Publication number
20020009411
Publication date
Jan 24, 2002
Gordon L. Zucker
B82 - NANO-TECHNOLOGY