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:
Dec. 03, 2013
Filed:
Dec. 22, 2011
Kiyup Kim, Seoul, KR;
Yonggyun Cho, Daejeon, KR;
Sangyeup Lee, Daejeon, KR;
Wonyeob Kim, Daejeon, KR;
Wonseok Jang, Daejeon, KR;
Myounglae Kim, Daejeon, KR;
Kiyup Kim, Seoul, KR;
Yonggyun Cho, Daejeon, KR;
Sangyeup Lee, Daejeon, KR;
Wonyeob Kim, Daejeon, KR;
Wonseok Jang, Daejeon, KR;
Myounglae Kim, Daejeon, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
Provided is an optical film using a cellulose derivative, which is used in image display devices such as liquid-crystal display devices. A liquid-crystal display device with a polarizing plate using the optical film has an excellent viewing angle property. More particularly, the present invention relates to an optical film made of a cellulose ester resin, a portion of hydrogen atoms of hydroxyl groups of which is substituted with two or more substituent groups.