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. 29, 1987
Filed:
Dec. 10, 1985
Applicant:
Inventors:
Assignee:
Tokuyama Soda Kabushiki Kaisha, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350357 ;
Abstract
An electrochromic display composed of a transparent electroconductive membrane, an electrochromic membrane, an ion-exchange membrane and a counter electrode in a laminated structure. The ion-exchange membrane is a bipolar ion-exchange membrane composed of at least one cation-exchange membrane layer having cation-exchange groups and at least one anion-exchange membrane layer containing anion-exchange groups in a laminated structure. The electrochromic display has a superior response speed, contrast and resolving power as well as a long service life.