US Patent 7531612 pH sensitive polymer and process for preparation thereof

Patent 7531612 was granted and assigned to Council for Scientific and Industrial Research on May, 2009 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

‌

Council for Scientific and Industrial Research

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7531612

Date of Patent

May 12, 2009

Patent Application Number

10738949

Date Filed

December 19, 2003

Patent Primary Examiner

‌

Robert D Harlan

Patent abstract

The present invention relates a novel pH sensitive polymer which exhibits pH dependant swelling/dissolution behavior. The composition is useful for taste masking of bitter drugs and also for the gastric delivery of the drugs. The said polymer comprises a hydrophobic monomer polymerized along with a basic monomer or a hydrophobic monomer polymerized along with a basic monomer and a hydrophilic monomer.

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