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:
Feb. 13, 1979
Filed:
Mar. 27, 1978
Applicant:
Inventors:
Nicholas J Clecak, San Jose, CA (US);
Barbara D Grant, Palo Alto, CA (US);
Annette B Jaffe, San Jose, CA (US);
Gary S Keller, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ; G02F / ;
U.S. Cl.
CPC ...
350357 ; 252408 ;
Abstract
Electrochromic display devices having very desirable stability and reversibility are obtained using as the oxidant certain fluorene compounds substituted with at least two alkoxy groups per molecule. The display device comprises a reactive medium between two electrically conductive electrodes at least one of which is transparent. The reactive medium comprises an anhydrous solvent and an oxidant/reductant pair.