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:
Aug. 13, 2002
Filed:
Aug. 30, 2000
Jeffrey R. Lomprey, Holland, MI (US);
Thomas F. Guarr, Holland, MI (US);
Kelvin L. Baumann, Holland, MI (US);
Gentex Corporation, Zeeland, MI (US);
Abstract
An electrochromic device comprising: (a) at least one substantially transparent substrate having an electrically conductive material associated therewith; and (b) an electrochromic medium having a predetermined color while in a high transmission state, wherein the electrochromic medium comprises: (1) an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (2) a redox buffer; and (3) means associated with the redox buffer for controllably maintaining the predetermined color of the electrochromic medium while in the high transmission state relative to an electrochromic medium without the redox buffer.