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. 08, 2016
Filed:
Feb. 15, 2013
Applicant:
Opsec Security Group, Inc., Denver, CO (US);
Inventor:
Donald William Tomkins, Lancaster, PA (US);
Assignee:
OPSEC SECURITY GROUP, INC., Denver, CO (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K 19/02 (2006.01); G02B 5/30 (2006.01); B42D 25/364 (2014.01); B42D 25/324 (2014.01); B42D 25/328 (2014.01);
U.S. Cl.
CPC ...
G02B 5/3016 (2013.01); B42D 25/324 (2014.10); B42D 25/328 (2014.10); B42D 25/364 (2014.10);
Abstract
A security device includes a liquid crystal layer having one of a cholesteric phase, a nematic phase, and a cholesteric phase and having molecules therein aligned volumetrically in a predetermined manner to form a predetermined diffractive optical pattern or image. The molecules of the liquid crystal layer are volumetrically aligned in the predetermined manner through at least a portion of the thickness of the liquid crystal layer.