Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Composite or multiple layer
Reexamination Certificate
2006-07-18
2006-07-18
Bissett, Melanie (Department: 1711)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Composite or multiple layer
C264S001800, C351S168000, C351S169000, C351S170000, C351S172000, C351S177000
Reexamination Certificate
active
07077985
ABSTRACT:
A flat or curved photochromic laminate structure and a plastic photochromic lens blank can be produced in a simple and efficient manner from relatively low-cost polymeric sheet materials. These laminates can be used to provide goggles, face shields, windows, window coverings, skylights, and optical lenses having efficient, uniform and high quality photochromic properties. The use of a polyesterurethane as the binder for the photochromic material has been found to improve the performance of the photochromic material. There may be a desire to have a protective exterior layer (e.g., an abrasion resistant layer) in combination with the lens system, but that may be provided in various methods. In the case of using the laminate in a goggle application, the laminate may be hard coated on one or both outer surfaces with an abrasion resistant coating, antireflective coating, and/or an anti-fog hard coating.
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Hage Martin L.
Kroulik Darrell B.
Maki Alan D.
Moravec Thomas J.
Travnicek Edward A.
Bissett Melanie
Inskeep IP Group, Inc.
Vision-Ease Lens
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