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:
Apr. 28, 2020
Filed:
May. 05, 2017
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Nitto Denko Corporation, Ibaraki-shi, JP;
Tomohiko Tanaka, Fukuoka, JP;
Michiaki Fuji, Mie, JP;
Nao Murakami, Osaka, JP;
Takashi Shimizu, Osaka, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
NITTO DENKO CORPORATION, Ibaraki-shi, JP;
Abstract
Disclosed herein is a process for producing a transparent film, including the step of stretching a film in at least one direction under a condition(s) that satisfies an expression (5):200%/min≤[stretching speed(strain rate)]≤1,200%/min  (5),wherein the film comprises a polycarbonate resin containing at least a constitutional unit derived from a dihydroxy compound (A) that has a bonded structure represented by a structural formula (1): in which no hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).