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. 04, 2014
Filed:
Jun. 17, 2008
Applicants:
Tetsuya Motoyoshi, Chiyoda-ku, JP;
Masatoshi Ando, Chiyoda-ku, JP;
Makoto Ueno, Chiyoda-ku, JP;
Akiko Nishijima, Chiyoda-ku, JP;
Inventors:
Tetsuya Motoyoshi, Chiyoda-ku, JP;
Masatoshi Ando, Chiyoda-ku, JP;
Makoto Ueno, Chiyoda-ku, JP;
Akiko Nishijima, Chiyoda-ku, JP;
Assignee:
Teijin Chemicals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 19/00 (2006.01); C08G 64/16 (2006.01); C08J 5/18 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
C08G 64/1608 (2013.01); G02F 2001/133637 (2013.01); C08J 2369/00 (2013.01); G02F 1/13363 (2013.01); C08J 5/18 (2013.01);
Abstract
It is an object of the present invention to provide an optical film which has reverse chromatic dispersibility that its retardation becomes smaller as the wavelength becomes shorter and a low photoelastic constant. The optical film is made of a polycarbonate copolymer containing a unit (A) represented by the following formula: