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:
Mar. 01, 2016
Filed:
Oct. 14, 2008
Applicant:
Robert Whiteman, Reading, GB;
Inventor:
Robert Whiteman, Reading, GB;
Assignee:
DE LA RUE INTERNATIONAL LIMITED, Basingstoke, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B42D 15/00 (2006.01); B42D 15/10 (2006.01); B42D 25/425 (2014.01); B42D 25/29 (2014.01); B42D 25/00 (2014.01); B42D 25/328 (2014.01); B42D 25/382 (2014.01); B42D 25/387 (2014.01);
U.S. Cl.
CPC ...
B42D 25/425 (2014.10); B42D 25/00 (2014.10); B42D 25/29 (2014.10); B42D 25/328 (2014.10); B42D 25/382 (2014.10); B42D 25/387 (2014.10); B42D 2033/08 (2013.01); B42D 2033/10 (2013.01); B42D 2033/16 (2013.01); B42D 2033/20 (2013.01); B42D 2033/32 (2013.01); B42D 2035/14 (2013.01); B42D 2035/16 (2013.01); B42D 2035/24 (2013.01); B42D 2035/36 (2013.01);
Abstract
A method of forming an optically variable security device is provided. In the method, a photonic crystal material is provided and a process is performed upon the material which causes deformation of the material so as to form a first region (A) for which incident light received by the crystal material is selectively reflected or transmitted to generate a first optically variable effect, and a second region (B) for which incident light received generates an optical effect, different from the first optically variable effect. Corresponding devices having first and second regions are also disclosed.