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:
Oct. 30, 2012
Filed:
Sep. 09, 2004
Xuzhi Qin, Hacienda Heights, CA (US);
Hideyo Sugimura, North Oaks, MN (US);
Michael S. Boulineau, Forest Lake, MN (US);
Xuzhi Qin, Hacienda Heights, CA (US);
Hideyo Sugimura, North Oaks, MN (US);
Michael S. Boulineau, Forest Lake, MN (US);
Insight Equity, A.P.X, LP, Ramsey, MN (US);
Abstract
A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of plastic photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The polyurethane layer is formed by curing a mixture of a solid thermoplastic polyurethane, at least one isocyanate prepolymer, at least one photochromic compound, and a stabilizing system.