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. 31, 2004
Filed:
Feb. 06, 2002
Applicant:
Inventors:
Rajendra Mehta, Dayton, OH (US);
Steven L. Yeager, Dayton, OH (US);
Assignee:
The Standard Register Company, Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/180 ; G01N 3/122 ;
U.S. Cl.
CPC ...
G01N 2/180 ; G01N 3/122 ;
Abstract
The invention is a method and system that is useful to authenticate security paper. Specifically, the present invention relates to a method and system that allows security paper to be authenticated more than once without destroying the authentication mechanism. An authenticating solution is applied to a surface of an authentic document or other authentic security paper. Subsequent application of an activating solution to a surface of a document containing the authenticating solution causes a reversible color change allowing the document to be authenticated.