Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Colin Dennis Campbell0
Joseph E. Sarver0
Damien Thurber Cole0
Date of Patent
June 9, 2009
0Patent Application Number
115895300
Date Filed
October 30, 2006
0Patent Primary Examiner
Patent abstract
A method for laser marking a substrate which method comprises exposing a composition comprising a tetrabenzodiazadiketoperylene pigment to laser radiation to produce a fluorescent marking readily apparent under UV light is disclosed. Many of the tetrabenzodiazadiketoperylenes herein are novel. This method can yield fluorescent markings which are not readily apparent under ambient light. A method for producing non-fluorescent laser marked substrates containing tetrabenzodiazadiketoperylene dyes is also disclosed.
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