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:
Jun. 09, 2009
Filed:
Oct. 30, 2006
Damien Thurber Cole, Drexel Hill, PA (US);
Joseph E. Sarver, Erial, NJ (US);
Colin Dennis Campbell, Claymont, DE (US);
Damien Thurber Cole, Drexel Hill, PA (US);
Joseph E. Sarver, Erial, NJ (US);
Colin Dennis Campbell, Claymont, DE (US);
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
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.