Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takuzo Ishida0
Kumars Sakizadeh0
Leif P. Olson0
Peter J. Cowdery-Corvan0
David R. Whitcomb0
Date of Patent
November 14, 2006
0Patent Application Number
110127880
Date Filed
December 15, 2004
0Patent Primary Examiner
Patent abstract
Non-photosensitive direct thermographic materials comprise a reducing agent that is a specific ortho-amino-phenol, para-amino-phenol, or hydroquinone compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing. The materials are characterized by their calculated aqueous deprotonation and their calculated anion HOMO energies.
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