The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2002
Filed:
Nov. 30, 2001
Applicant:
Inventors:
Vivek Kapur, Kennett Square, PA (US);
Kenneth Wayne Leffew, Kennett Square, PA (US);
Govindasamy Paramasivam Rajendran, Boothwyn, PA (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/302 ;
U.S. Cl.
CPC ...
C08G 6/302 ;
Abstract
A process for producing an oriented shaped article that comprises the steps of (a) forming a shaped article comprising a block copolymer comprising 75% to 90% by weight of polyethylene terephthalate blocks and 10% to 25% by weight of polyethylene isophthalate blocks and (b) biaxially stretching the shaped article to a planar stretch ratio of 10 to 30.