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:
Jun. 12, 1979
Filed:
Jun. 09, 1978
Helmut Grottrup, Munich, DE;
Wittich Kaule, Munich, DE;
Thomas Maurer, Munich, DE;
Gerhard Stenzel, Munich, DE;
Abstract
The valuable papers, such as the securities and the like, have safeguard elements against forgery or falsification and which can be mechanically examined using light of the visible, ultraviolet or infrared spectral regions and which are effective, particularly, against erasure. The paper is provided with a homogeneous protective coating which is applied either prior to or following the application of an information print by an ink impression. The paper, the protective coating and the printing ink have respective reflectance or fluoroescence properties such that, any damage to the protective coating, such as an attempted erasure, is detectable either at the wavelength of light serving to read the information print or at a special test wavelength.