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:
Nov. 03, 1981
Filed:
Aug. 29, 1979
Roland Moraw, Wiesbaden, DE;
Helmut Walter, Wiesbaden, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The application discloses an identity card consisting of a plurality of layers, of which the cover layers are highly transparent films and the layers of the card core are films of moderate to low transparency, as a result of added pigment. One core layer carries information, which can be read directly, if desired, above a security print, while the other core layer has an additional security marking, such as a guilloche print, a marking which can be read optically only with the aid of a special lamp, or a piece of magnetic tape. All the layers consist of polymers which can be fused together to form a laminate which is fused together like a monolithic block and which does not have any interfaces which allow a mechanical, thermal or chemical separation.