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. 19, 2026
Filed:
Oct. 18, 2021
Toyobo Co., Ltd., Osaka, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
An object is to provide a polyethylene terephthalate-based resin film that has excellent processing suitability and that particularly can effectively suppress the occurrence of cleavage in the film layer of a portion cut with a knife. Another object is to provide a polarizer, a transparent conductive film, a touch panel, and image display devices such as a liquid crystal display device and an organic EL display device, all of which use the polyethylene terephthalate-based resin film. A polyethylene terephthalate-based resin film satisfying the following (1) and (2): (1) the polyethylene terephthalate-based resin film has a retardation of 3000 to 30000 nm; and (2) the polyethylene terephthalate-based resin film has an amorphous orientation parameter of 0.330 or more as measured by an ATR-FTIR method.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile