Photochromic synthetic resin object with permanently...

Details Photochromic synthetic resin object with permanently... Photochromic synthetic resin object with permanently...

2005-02-08

2005-02-08

Epps, Georgia (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S238000, C359S240000, C252S586000

Reexamination Certificate

active

06853471

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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T.R. Pampalone and F.A. Kuyan, Contrast Enhancing Additives for Positive Photoresist, Journal of the Electrochemical Society 135 Feb. (1988), No. 2.
German Office Action.

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