Photochromic polyurethane laminate

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United States of America Patent

PATENT NO 8298671
SERIAL NO

10938275

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Abstract

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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.

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Patent Owner(s)

  • VISION EASE, LP

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boulineau, Michael S Forest Lake, US 28 418
Qin, Xuzhi Hacienda Heights, US 27 636
Sugimura, Hideyo North Oaks, US 31 674

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