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. 26, 2010
Filed:
Sep. 06, 2006
Tae-sik Kang, Daejeon, KR;
Sang-hyuk Im, Daejen, KR;
Seung-heon Lee, Daejeon, KR;
Young-jun Hong, Daejeon, KR;
Tae-Sik Kang, Daejeon, KR;
Sang-Hyuk Im, Daejen, KR;
Seung-Heon Lee, Daejeon, KR;
Young-Jun Hong, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
The present invention relates to a method of preparing a photochromic film or plate comprising printing a photochromic substance in the unit of an independent spot on a part or the whole of a basic material and forming a protective layer on the basic material, on which the photochromic substance is coated, so as to protect the photochromic substance. According to the present invention, the photochromic substance is printed in the unit of an independent spot so that the printed unit spots are isolated from each other, thereby prolonging the life of the photochromic substance.