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. 17, 1985
Filed:
Mar. 22, 1983
Helmut Sautter, Ditzingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To assure a durable bonded joint between the two substrates on which the respective electrodes of an electrochromic device are joined together by an adhesive to form a cavity between them for an electrolyte, a baked-on layer of polyvinyl alcohol or polyvinyl butyral is provided to promote adhesion, allowing a commercially available two-component adhesive to provide a firm joint even if the non-transparent substrate is of metal. The adhesion promoting coating is also used to line the cavity, except where the electrodes are, thus providing insulation and chemical isolation which is important, at least for the metal substrate. The electrolyte is filled through a hole in the metal substrate, which is thereafter plugged with a low-melting solder. The metal foil of a circuit board can be used to provide the rear portions of a number of electrochromic indicators fitting against a common glass plate if cut-outs are provided in the circuit board into which the metal can be deformed to provide the necessary electrolyte cavities.