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:
Jul. 14, 2015
Filed:
Oct. 10, 2009
Heinz Pudleiner, Krefeld, DE;
Mehmet-cengiz Yesildag, Leverkusen, DE;
Georgios Tziovaras, Wuppertal, DE;
Dirk Pophusen, Bergisch Gladbach, DE;
Heinz Pudleiner, Krefeld, DE;
Mehmet-Cengiz Yesildag, Leverkusen, DE;
Georgios Tziovaras, Wuppertal, DE;
Dirk Pophusen, Bergisch Gladbach, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The invention relates to layer structures for ID cards on which information can be written by laser engraving and which have an additional layer that is applied to the card body after the laser engraving and restricts or completely prevents subsequent writing on the card by means of laser engraving, and consequently prevents falsification of the identifying information contained, and relates to a method for blocking the laser engraving writability of layer structures on which information can be written by laser engraving.