Polymeric antioxidants

US7601378B2 · kind B2 · utility

Assignees

• University of Massachusetts Lowell · US
• The United States of America as represented by the Secretary of the Army · US

Inventors

• Ashok L. Cholli · Chelmsford, US
• Vijayendra Kumar · Lowell, US
• Jayant Kumar · Westford, US
• Virinder Singh Parmar · Lowell, US
• Lynne A. Samuelson · Marlborough, US
• Ferdinando Bruno · Andover, US

Key dates

• Filing date: Sep 26, 2005
• Grant date: Oct 13, 2009
• Expiry date: Apr 7, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31993
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The following is an examiner's statement of reasons for allowance: an antioxidant polymer and method of preparing, the antioxidant comprising repeat units that include one or both of Structural Formulas (I) and (II) wherein R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group is not taught nor fairly suggested by the prior art or any combination thereof.