Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 6, 2011
Patent Application Number
12114148
Date Filed
May 2, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method of manufacturing a lens presenting a graded tint, the lens comprising first and second layers each of which is made of a thermoplastic material, with only one of the layers being colored in the tint concerned, the method including the steps of:injecting the thermoplastic material of the first layer into a first mold cavity in order to form the first layer; andplacing the first layer in a second mold cavity and injecting therein the thermoplastic material of the second layer so as to form the second layer on the first layer.
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