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:
May. 21, 2013
Filed:
Nov. 23, 2010
Kouichi Sawasaki, Nagoya, JP;
Masahiro Oguni, Nagoya, JP;
Kouichi Sawasaki, Nagoya, JP;
Masahiro Oguni, Nagoya, JP;
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The present invention is directed to a polyimide film with a uniform orientation angle in the transverse direction of the film. A polyimide film characterized by the fact that the width of the fabricated film is ≧1.5 m, 2 points positioned inside by 200 mm from both ends of the width of the fabricated film are selected on a linear line in the vertical direction to the machine direction (MD) of the film, 1 point within center part ±200 mm, and 2 optional points are further selected on a linear line that includes said 2 points within the range of the linear line that connects said 2 points, and the orientation angle (θ) is within a range of 90°±23° in at least all of these 8 points.