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:
Nov. 21, 2017
Filed:
Jul. 08, 2015
Keiwa Inc., Osaka, JP;
Yoshitada Namikawa, Osaka, JP;
KEIWA INC., Osaka, JP;
Abstract
An optical sheet includes: a transparent substrate sheet; and a sticking preventive portion provided on the back face of the transparent substrate sheet. The sticking preventive portion includes a plurality of printed dots. The average diameter of the printed dots is preferably no less than 1 μm and no greater than 200 μm. The ratio of the average height to the average diameter of the printed dots is preferably no less than 1/100 and no greater than 1. The printed dot preferably has a hemisphere-like shape having a height less than a diameter. The arrangement density of the printed dots on the back face of the substrate sheet is preferably no less than 10 dots/mmand no greater than 2,500 dots/mm. A principal component of the printed dots is preferably is preferably an acrylic resin, a urethane resin or an acrylic urethane resin.