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Nag Joon Choi
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Patents Grants
last 30 patents
Information
Patent Grant
Distributor base
Patent number
8,221,674
Issue date
Jul 17, 2012
Siemens Vai Metals Technologies GmbH
Franz Hauzenberger
C21 - METALLURGY OF IRON
Information
Patent Grant
Apparatus for manufacturing molten irons
Patent number
8,119,059
Issue date
Feb 21, 2012
Posco
Min-Young Cho
C21 - METALLURGY OF IRON
Information
Patent Grant
Fluidized bed breakage prevention system for fluidized bed reductio...
Patent number
6,736,876
Issue date
May 18, 2004
Research Institute of Industrial Science & Technology
Myoung-Kyun Shin
C21 - METALLURGY OF IRON
Information
Patent Grant
Fluidized bed reactor for preventing the fine iron ore from stickin...
Patent number
6,585,798
Issue date
Jul 1, 2003
Pohang Iron & Steel Co., Ltd.
Nag-Joon Choi
C21 - METALLURGY OF IRON
Information
Patent Grant
2-stage fluidized bed type fine iron ore reducing apparatus, and re...
Patent number
6,491,738
Issue date
Dec 10, 2002
Pohang Iron & Steel Co., Ltd.
Il Ock Lee
C21 - METALLURGY OF IRON
Information
Patent Grant
Two step twin-single fluidized bed pre-reduction apparatus for pre-...
Patent number
6,235,079
Issue date
May 22, 2001
Pohang Iron & Steel Co., Ltd.
Nag Joon Choi
C21 - METALLURGY OF IRON
Information
Patent Grant
3-Stage fluidized bed type fine iron ore reducing apparatus having...
Patent number
6,110,413
Issue date
Aug 29, 2000
Pohang Iron & Steel Co., Ltd.
Uoo Chang Jung
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
Information
Patent Application
DISTRIBUTOR BASE
Publication number
20090039573
Publication date
Feb 12, 2009
Franz Hauzenberger
C21 - METALLURGY OF IRON
Information
Patent Application
Apparatus for Manufacturing Molten Irons
Publication number
20090008841
Publication date
Jan 8, 2009
Posco
Min-Young Cho
C21 - METALLURGY OF IRON
Information
Patent Application
Fluidized bed reactor for preventing the fine iron ore from stickin...
Publication number
20020166412
Publication date
Nov 14, 2002
Nag-Joon Choi
C21 - METALLURGY OF IRON
Information
Patent Application
Device for preventing back mixture in fluidized bed reactor
Publication number
20020136670
Publication date
Sep 26, 2002
Hang-Goo Kim
C21 - METALLURGY OF IRON