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:
Apr. 10, 2018
Filed:
May. 31, 2013
Applicant:
President and Fellows of Harvard College, Cambridge, MA (US);
Inventors:
Joanna Aizenberg, Boston, MA (US);
Tak Sing Wong, State College, PA (US);
Sung Hoon Kang, Cambridge, MA (US);
Ximin He, Cambridge, MA (US);
Assignee:
President and Fellows of Harvard College, Cambridge, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06K 19/00 (2006.01); B42D 25/351 (2014.01); B42D 25/24 (2014.01); B32B 27/08 (2006.01); B42D 25/29 (2014.01); B42D 25/342 (2014.01); B42D 25/00 (2014.01); B42D 25/23 (2014.01); B81B 3/00 (2006.01); G07D 7/00 (2016.01); B42D 25/324 (2014.01); G02B 5/18 (2006.01);
U.S. Cl.
CPC ...
B42D 25/351 (2014.10); B32B 27/08 (2013.01); B42D 25/00 (2014.10); B42D 25/23 (2014.10); B42D 25/24 (2014.10); B42D 25/29 (2014.10); B42D 25/342 (2014.10); B81B 3/0083 (2013.01); G07D 7/003 (2017.05); B42D 25/324 (2014.10); B42D 2033/30 (2013.01); B42D 2035/20 (2013.01); B42D 2035/24 (2013.01); B42D 2035/34 (2013.01); B81B 2201/00 (2013.01); G02B 5/1828 (2013.01);
Abstract
A document and an Anti-counterfeiting method for use in such documents are described. Said document and Anti-counterfeiting method include introducing a plurality of raised nanoscopic to microscopic structures, here referred to as reconfigurable structures, formed over a polymer substrate to induce optical changes, such as structural color and/or optical fuzziness. Dynamic changes using liquids provide the anti-counterfeiting measures.