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US 7,396,942 B2Granted
Dual function UV-absorbers for ophthalmic lens materials
AssigneeAlcon Inc.
InventorDouglas C. Schuleter
Life of this patent
Estimating the term…
Abstract
Disclosed are UV absorbers that contain a labile functional group capable of initiating free radical polymerization.
Claims2
A dual function UV absorber of the formula:
- where:
- J is CH3 or CH2CH3.
- L is nothing, (CH2)y or (CH2CH2O)y where y=1−10.
- G is —R, —OR, —NHR, —NRR′, —CO2R, or —COR, where R=a benzotriazole or hydroxyphenylbenzophenone UV absorber, and R′=—CH3 or —CH2CH3.
1 more element
Dependencies are inferred from the claim text.