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:
Jan. 23, 1979
Filed:
Oct. 25, 1977
Applicant:
Inventors:
Jean-Yves Godet, Charavines, FR;
Giampaolo Bartoli, Charavines, FR;
Assignee:
Societe Anonyme dite: Arjomari-Prioux, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ; B41M / ; B44F / ;
U.S. Cl.
CPC ...
428537 ; 8 1 / ; 8 542 ; 106148 ; 162140 ; 427-7 ; 427157 ; 427158 ; 428411 ; 428913 ; 428916 ;
Abstract
Security paper which immediately reveals an attempt to alter handwriting thereon by the use of an alkaline ink remover and which is characterized by the incorporation therein of a pyrenesulphonic acid or a metal salt thereof, particularly an alkali metal or alkaline earth metal salt. Security paper incorporating such an acid or salt exhibits a fluorescent coloration when contacted with an alkaline ink remover.