Wenfeng Shi

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Shizuishan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method for preparing a tantalum powder
- Patent number 9,199,307
- Issue date Dec 1, 2015
- Ningxia Orient Tantalum Industry Co., Ltd.
- Guoqi Yang
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Process for preparing tantalum powder for capacitors
- Patent number 8,673,052
- Issue date Mar 18, 2014
- Ningxia Orient Tantalum Industry Co., Ltd.
- Wenfeng Shi
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for preparing powder of niobium suboxides or niobium
- Patent number 7,727,508
- Issue date Jun 1, 2010
- Ningxia Orient Tantalum Industry Co., Ltd.
- Wenfeng Shi
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR PREPARING A TANTALUM POWDER
- Publication number 20120291593
- Publication date Nov 22, 2012
- Ningxia Orient Tantalum Industry Co., Ltd.
- Guoqi Yang
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Process for Preparing Tantalum Powder for Capacitors
- Publication number 20100326239
- Publication date Dec 30, 2010
- Ningxia Orient Tantalum Industry Co., Ltd.
- Wenfeng SHI
- B22 - CASTING POWDER METALLURGY
Information Patent Application
TANTALUM POWDER, METHOD FOR PREPARING THE SAME, AND ELECTROLYTIC CA...
- Publication number 20100226070
- Publication date Sep 9, 2010
- Guoqi Yang
- B22 - CASTING POWDER METALLURGY
Information Patent Application
PROCESS FOR PREPARING POWDER OF NIOBIUM SUBOXIDES OR NIOBIUM
- Publication number 20090053132
- Publication date Feb 26, 2009
- Wenfeng SHI
- B22 - CASTING POWDER METALLURGY