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:
Apr. 27, 2004
Filed:
Jul. 26, 2002
Applicant:
Inventors:
Assignee:
Nippon Oil Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/15 ; G02F 1/153 ;
U.S. Cl.
CPC ...
G02F 1/15 ; G02F 1/153 ;
Abstract
An electrochromic device comprises an ion conductive layer containing an electrochromic polymer that has a bipyridine ion pair structure and a metallocene structure and/or a dihydroxyphenaizine structure. The device has low leakage current and reduced remnant coloration after a long time use.