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:
Dec. 04, 2012
Filed:
Oct. 31, 2008
Applicants:
Hyeon Choi, Daejeon, KR;
Jee-seon Kim, Seoul, KR;
Woo-sung Kim, Daejeon, KR;
Young-jun Hong, Daejeon, KR;
Inventors:
Hyeon Choi, Daejeon, KR;
Jee-Seon Kim, Seoul, KR;
Woo-Sung Kim, Daejeon, KR;
Young-Jun Hong, Daejeon, KR;
Assignee:
LG Chem, Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/23 (2006.01); G02C 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a photochromic composition comprising multifunctional (meth)acrylate-based monomers having two or more functional groups, a photochromic dye and an aromatic vinyl compound, in which the content of the aromatic vinyl compound is more than 30% by weight and 70% by weight or less, a photochromic film produced by using the same, and a method for producing the photochromic film.