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:
Jan. 03, 2023
Filed:
Apr. 18, 2018
Korea Minting, Security Printing & ID Card Operating Corp., Daejeon, KR;
Shin-hyun Kim, Daejeon, KR;
Gun Ho Lee, Daejeon, KR;
Won Gyun Choe, Daejeon, KR;
Soo Dong Kim, Daejeon, KR;
Ju Hee Kang, Daejeon, KR;
Hong Keon Kim, Daejeon, KR;
Hyun Soo Kim, Daejeon, KR;
E Den Kim, Gwangju, KR;
Abstract
A photonic crystal film, a method for manufacturing the photonic crystal film, and an anti-forgery article comprising the photonic crystal film are disclosed. The photonic crystal film includes a polyurethane-based polymer matrix and colloidal particles dispersed in the polyurethane-based polymer matrix and arranged in a crystal lattice structure. The colloidal particles includes one or more selected from metal nanoparticles, metal oxide nanoparticles, organic nanoparticles, and carbon structure nanoparticles.