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US Patent 7202328 Amorphous polymer article

Patent 7202328 was granted and assigned to BTG International Limited on April, 2007 by the United States Patent and Trademark Office.

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Patent
Patent
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Patent attributes

Current Assignee
BTG International Limited
BTG International Limited
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
72023281
Patent Inventor Names
Peter J Hine1
Ian M Ward1
Date of Patent
April 10, 2007
1
Patent Application Number
104808301
Date Filed
June 14, 2002
1
Patent Primary Examiner
‌
Terressa Boykin
1
Patent abstract

Method of producing an article comprising providing a raw material in the form of a plurality of polymer elements, the polymer elements comprising an amorphous polymer; heating the materials to a temperature above a first predetermined temperature; and compacting the material whilst above the first predetermined temperature. The first predetermined temperature is the Tg of the polymer elements, the pressure is between 100 and 200 psi; and the temperature and pressure of compaction are sufficient to soften the outer portion of the polymer elements and to cause the polymer elements to bonds to each other without melting or softening of the inner portion of polymer elements. A product is produced having a structure which comprises cores of amorphous polymer that have not been softened or melted in the method, surrounded by a mass of softened and re-hardened material which bonds the cores together.

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