Optical: systems and elements – Lens
Reexamination Certificate
2010-09-10
2011-11-22
Boykin, Terressa (Department: 1765)
Optical: systems and elements
Lens
C524S502000, C524S599000, C525S410000, C525S418000, C525S474000, C528S196000, C528S198000, C528S271000, C528S272000
Reexamination Certificate
active
08064140
ABSTRACT:
An optical grade article comprises a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising 10 to 25 wt % of a soft block ester unit derived from a C20-44aliphatic dicarboxylic acid or derivative thereof, 34 to 77 wt % of a carbonate unit derived from 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, 0 to 76 wt % of a carbonate unit derived from a dihydroxyaromatic compound not identical to the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the weight percentages of soft block ester units, 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine units, and dihydroxyaromatic compound units is 100 weight percent of the monomeric units of the poly(aliphatic ester)-polycarbonate, the refractive index of the thermoplastic composition is greater than 1.590, and the glass transition temperature of the poly(aliphatic ester)-polycarbonate is from 120 to 155° C. A camera lens also comprises the poly(aliphatic ester)-polycarbonate.
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Hoeks Theodorus Lambertus
Kamps Jan Henk
Karlik Dennis
Kung Edward
Takemori Michael Teruki
Boykin Terressa
Cantor & Colburn LLP
Sabic Innovative Plastics IP B.V.
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