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Taipei, TW
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Patents Grants
last 30 patents
Information
Patent Grant
Method for purifying an aqueous patassium hydroxide solution having...
Patent number
7,988,831
Issue date
Aug 2, 2011
Yeou Fa Chemical Co., Ltd.
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Processes for purifying phosphoric acid and for preparing phosphori...
Patent number
7,166,264
Issue date
Jan 23, 2007
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Processes for purifying phosphoric acid and for preparing phosphori...
Patent number
7,083,768
Issue date
Aug 1, 2006
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
Method for purifying an aqueous patassium hydroxide solution having...
Publication number
20100032281
Publication date
Feb 11, 2010
YEOU FA CHEMICAL CO., LTD.
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY
Information
Patent Application
Processes for purifying phosphoric acid and for preparing phosphori...
Publication number
20060171871
Publication date
Aug 3, 2006
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY
Information
Patent Application
Processes for purifying phosphoric acid and for preparing phosphori...
Publication number
20050287061
Publication date
Dec 29, 2005
Yung Hsiung Hsu
C01 - INORGANIC CHEMISTRY