Patents Represented by Attorney William Hervey

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  • Method for tinting a hydrophilic contact lens
    Patent number: 5266077
    Abstract: A method of tinting an unhydrated contact lens involves the steps of providing an unhydrated contact lens; providing a dyestuff solution; providing a printing block comprising a hydrophilic polymer material containing a dye complexing agent capable of noncovalently bonding the dyestuff; placing the dyestuff solution onto the printing block; contacting the unhydrated contact lens and the printing block for a time sufficient to allow the dyestuff solution to diffuse to the lens; and removing the lens from the printing block.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: November 30, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Richard D. Auten, Robert A. Janssen, Leslie F. Stebbins, Richard C. Turek
  • Ultraviolet radiation absorbing agent for bonding to an ocular lens
    Patent number: 5098445
    Abstract: An ultraviolet radiation absorbing contact lens and method ofl making the same, comprising a copolymeric hydrogel material to which is covalently bonded at least one halotriazine reactive ultraviolet radiation absorbing agent of the formula: ##STR1## where X=Cl or F;E,A=an ultraviolet radiation absorbing component; andE.sup.1 =an aqueous soluble moiety.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: March 24, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: William M. Hung, Kai C. Su