Optical: systems and elements – Lens
Reexamination Certificate
2011-03-15
2011-03-15
Tran, Thao T. (Department: 1787)
Optical: systems and elements
Lens
C428S482000, C430S541000, C430S559000
Reexamination Certificate
active
07907346
ABSTRACT:
Photochromic materials and photochromic compositions and articles including the photochromic materials are disclosed. The photochromic materials may be the reaction product of a hyperbranched polyester polyol having, on average, at least two reactive hydroxyl groups, and at least one photochromic indeno-fused naphthopyran.
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Knox Carol L.
Swarup Shanti
Wang Feng
Altman Deborah M.
Mallak Frank P.
Tran Thao T.
Transitions Optical Inc.
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