US Patent 7479311 Optically anisotropic film and method for making

Patent 7479311 was granted and assigned to Nitto Denko on January, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Nitto Denko

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7479311

Date of Patent

January 20, 2009

Patent Application Number

10407304

Date Filed

April 3, 2003

Patent Primary Examiner

‌

William P. Watkins, III

Patent abstract

Anisotropic film could be used for manufacturing devices of various purposes including information liquid crystal displays, illuminating equipment, decorative products, for manufacturing trademarks and service signs, etc. Essence of the invention: optically anisotropic film is obtained of molecularly oriented organic having varying direction of optical axis (axes) throughout its thickness on at least a fraction of the film's thickness, for at least one region of the spectrum and on at least a part of the area of the film.