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. 16, 1997
Filed:
Feb. 18, 1997
Applicant:
Inventors:
Yoriaki Matsuzaki, Kanagawa-ken, JP;
Ryu Oi, Kanagawa-ken, JP;
Rihoko Imai, Tokyo, JP;
Keisuke Takuma, Kanagawa-ken, JP;
Hisato Itoh, Fukuoka-ken, JP;
Assignee:
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
534690 ; 534704 ; 534716 ; 534797 ; 534829 ; 534834 ; 8662 ;
Abstract
The present invention provides a polarizing film having high heat resistance and a high degree of polarization and excellent optical properties by dyeing a polymer film with a novel azo compound represented by the following formula (1) or (2): ##STR1##