Contact lenses bearing identifying marks
AssigneeJohnson & Johnson Vision Products, Inc.
InventorsJongliang Wu, Khaled A. Chehab, Carl G. Crowe, Timothy R. Poling, Richard J. Nason, Jon Scott Walker, Susan-Wendy B. Neadle, Patricia Ann Hutfles, W. Anthony Martin
Life of this patent
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Abstract
This invention provides a contact lens comprising a front surface, a back surface and an identifying mark on at least one of said front surface and said back surface, wherein said identifying mark comprises a depressed region having a cross-section which comprises at least two intersecting concave surfaces at the bottom of said depressed region.
Claims34
A contact lens comprising a front surface, a back surface and an identifying mark on at least one of said front surface and said back surface, wherein said identifying mark comprises a depressed region having a top and a bottom, said top of said depressed region being where the surface of said depressed region meets the surface of either said front surface or said back surface of said contact lens, the remainder of the surface of said depressed region being said bottom of said depressed region, wherein for at least 50 percent of the total surface area of said bottom of said depressed region, a cross-section of said depressed region comprises at least two intersecting concave surfaces, and said intersecting concave surfaces form an angle .beta., with the proviso that said angle .beta. cannot be 0, and further wherein said cross-section comprises an overall width or diameter and maximum depth.
A contact lens comprising a front surface, a back surface and an identifying mark on at least one of said front surface and said back surface, wherein said identifying mark comprises a depressed region having a diameter or width greater than 100 microns, said depressed region further comprises an angle .alpha. formed where the surface of the depressed region meets the surface of either said front surface or said back surface of said contact lens, said angle .alpha. is less than 20.degree..
A contact lens comprising a front surface, a back surface and an identifying mark on at least one of said front surface and said back surface, wherein said identifying mark comprises a depressed region having a diameter or width greater than 100 microns, further wherein said depressed region comprises a top where the surface of the depressed region meets the surface of either said front surface or said back surface of said contact lens, and the radius of curvature at the top of said depressed region is greater than 30 microns.
Dependencies are inferred from the claim text.