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:
Jun. 03, 2014
Filed:
Mar. 25, 2009
Tomoyuki Hirayama, Ibaraki, JP;
Toshiyuki Iida, Ibaraki, JP;
Yutaka Ohmori, Ibaraki, JP;
Satoru Suzuki, Ibaraki, JP;
Miyuki Kurogi, Ibaraki, JP;
Hisae Shimizu, Ibaraki, JP;
Tomoyuki Hirayama, Ibaraki, JP;
Toshiyuki Iida, Ibaraki, JP;
Yutaka Ohmori, Ibaraki, JP;
Satoru Suzuki, Ibaraki, JP;
Miyuki Kurogi, Ibaraki, JP;
Hisae Shimizu, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, JP;
Abstract
The birefringent film of the present invention contains an aromatic polyester having a repeating unit represented by the following general formula (1). In the general formula (1), A(s), B(s), C(s), and D(s) are each independently represent a group selected from a halogeno group, an alkyl group which has 1 to 6 carbon atoms, and an aryl group. Also, a and b each represent an integer of 0 to 4, and c and d each represent an integer of 0 to 3. R1 represents a hydrogen atom, or an alkyl group which has 1 to 10 carbon atoms. R2 represents an alkyl group which has 2 to 10 carbon atoms. R3 to R6 each independently represent a group or atom selected from a hydrogen atom, a halogeno group, an alkyl group which has 1 to 6 carbon atoms, and an aryl group. Furthermore, l and m each represent an integer of 2 or more.