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:
Sep. 20, 2022
Filed:
Mar. 29, 2018
Toyobo Co., Ltd., Osaka, JP;
Amane Hirose, Tokyo, JP;
Nobuyuki Nakanishi, Tokyo, JP;
Mitsuo Tojo, Tokyo, JP;
Dai Nakagawa, Tokyo, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
A multi-layer, layered film includes a multi-layer, alternately layered body containing birefringent first layers including a first resin and isotropic second layers including a second resin, in which the multi-layer, layered film has a layer thickness profile with which light at a wavelength of from 380 to 780 nm can be reflected due to optical interference between each of the first layers and each of the second layers, in which a layer thickness profile for an optical thickness of the first layers has a first monotonically increasing region which meets specific requirements, and in which a layer thickness profile for an optical thickness of the second layers has a second monotonically increasing region which meets specific requirements.