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US Patent 7619120 Processes for the preparation of diphenylsulfone compounds

Patent 7619120 was granted and assigned to Nippon Soda Co., Ltd. on November, 2009 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Nippon Soda Co., Ltd.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76191200

Patent Inventor Names

Yutaka Takashina0

Kiyoshi Katsuura0

Tomoya Hidaka0

Yasuo Ohnuki0

Date of Patent

November 17, 2009

Patent Application Number

109508890

Date Filed

September 27, 2004

Patent Primary Examiner

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Karl J Puttlitz

Patent abstract

The present invention is to provide methods for producing highly pure 4,4′-dihydroxydiphenyl sulfone monoethers advantageously in industrial production.

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