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, 1999
Filed:
Dec. 04, 1996
Applicant:
Inventor:
Lode Deprez, Wachtebeke, BE;
Assignee:
Agfa-Gevaert, N.B., Mortsel, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03F / ; G03F / ; B41M / ;
U.S. Cl.
CPC ...
430331 ; 430204 ; 430264 ; 430460 ; 430461 ; 430493 ; 101465 ; 2521861 ;
Abstract
The present invention provides a correcting liquid for silver imaged lithographic printing plates being an aqueous solution having a pH in the range between 5.5 and 8.5 and comprising a iron (III) complex salt of an organic acid, a sulphite or a metabisulphite, a silver halide solvent and an accelerator, said accelerator being an organic heterocyclic compound having a mercapto- or thione group and not having a hydrophilic substituent besides the said mercapto or thione group characterized in that said accelerator is present in an amount ranging from 0.04 to 0.4 mole per liter of correcting liquid.