Stock material or miscellaneous articles – Composite
Reexamination Certificate
2007-01-23
2007-01-23
Zacharia, Ramsey (Department: 1773)
Stock material or miscellaneous articles
Composite
C428S412000, C428S413000, C428S423100, C428S426000, C428S457000, C428S480000, C428S500000, C428S522000, C428S533000, C428S537100, C428S537500
Reexamination Certificate
active
10393179
ABSTRACT:
Described are photochromic articles that include a substrate and a photochromic amount of at least one organic photochromic material (b) represented by graphic formula XIII adapted to change from an unactivated state to an activated state by exposure to radiation substantially in a wavelength range from 380 to 410 nanometers (nm) when measured over a wavelength range of from 380 to 700 nm. The photochromic articles demonstrate a photochromic response when activated behind an ultraviolet blocking transparency such as an automotive windshield. For example, the photochromic articles retain at least 12 percent of the activation measured as change in optical density or delta OD under outdoor simulating conditions in the Outdoor Test when tested under conditions simulating an eyeglass wearer behind an automotive windshield in the Behind the Windshield Test. Methods for producing the aforedescribed photochromic articles are also described.
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Chopra Anu
Gemert Barry Van
Kumar Anil
Misura Michael S.
Nelson Clara E.
Altman Deborah M.
Mallak Frank P.
Pingitore Linda
Transitions Optical Inc.
Zacharia Ramsey
LandOfFree
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