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:
Feb. 04, 2014
Filed:
Sep. 23, 2011
Sean Purdy, Cincinnati, OH (US);
Jessica M. Williamson, Wilder, KY (US);
Anil Kumar, Murrysville, PA (US);
Noel R. Vanier, Wexford, PA (US);
Wei Wang, Allison Park, PA (US);
Shan Cheng, Sewickley, PA (US);
Xiangling Xu, Pittsburgh, PA (US);
Sean Purdy, Cincinnati, OH (US);
Jessica M. Williamson, Wilder, KY (US);
Anil Kumar, Murrysville, PA (US);
Noel R. Vanier, Wexford, PA (US);
Wei Wang, Allison Park, PA (US);
Shan Cheng, Sewickley, PA (US);
Xiangling Xu, Pittsburgh, PA (US);
PPG Industries Ohio, Inc, Cleveland, OH (US);
Abstract
The invention includes a composite material for use in a security device including a radiation diffracting component that exhibits a first optical effect and a photochromic component that exhibits a second optical effect. The composite material is particularly suited for use in authenticating articles, such as currency.