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:
Dec. 25, 2012
Filed:
May. 13, 2009
Timothy D. Klots, Plymouth, MI (US);
David D. Schatz, Ann Arbor, MI (US);
Marc Schroeder, Canton, MI (US);
Jürgen Kaczun, Wachenheim, DE;
Timothy D. Klots, Plymouth, MI (US);
David D. Schatz, Ann Arbor, MI (US);
Marc Schroeder, Canton, MI (US);
Jürgen Kaczun, Wachenheim, DE;
BASF Corporation, Wyandotte, MI (US);
Abstract
A method of revealing exposure of a substrate to an environmental stimulus includes exposing the substrate to the environmental stimulus, where the substrate includes at least one indicia, where each of the at least one indicia includes a plurality of chromatically selective scattering particles having a particle size distribution as measured by (weight average diameter)/(number average diameter) of less than or equal to about 1.1, and a colorant; and the at least one indicia exhibits a change in color in response to the environmental stimulus.