Photochromic synthetic resin object with permanently increased contrast
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United States of America Patent
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Feb 8, 2005
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app pub date -
Jan 30, 2002
filing date -
May 30, 2000
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Abstract
A photochromic synthetic resin (i.e., plastic) object characterized by a permanently increased contrast relative to the contrast of prior art photochromic synthetic resin objects, such that the photochromic synthetic resin object according to the invention exhibits improved contrast in the stationary states and in every intervening phase, including both darkening and lightening. The photochromic synthetic resin objects of the invention are particularly useful as lenses for eyeglasses, especially for sports glasses.
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