Method of forming iris variegation patterns on contact lenses
March 27, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1644798 Process for identification marking clear plastic articles Method of marking plastic lenses Method of selectively tinting soft contact lenses Method and apparatus for marking contact lenses Process for producing colored contact lens Lens tinting fixture and system utilizing said fixture Opaque tinting process for contact lens Patent #: 4634449 InventorAssigneeApplicationNo. 06/844652 filed on 03/27/1986US Classes:8/453, Vat dye or sulfur dye, e.g., quinonic or indigoid reducible dye, sulfur organic reaction product dye, etc.8/446, Resist or reserve8/465, Vat dye or sulfur dye, e.g., quinonic or indigoid reducible dye, sulfur organic compound reaction product dye, etc.8/507, Contact lens8/650Sulfur dye or vat dyeExaminersPrimary: Clingman, A. LionelAttorney, Agent or FirmInternational ClassesB29D 11/00 (20060101)D06P 1/92 (20060101) D06P 5/00 (20060101) D06P 1/00 (20060101) D06P 1/22 (20060101) G02C 7/02 (20060101) G02C 7/04 (20060101) AbstractA tinted soft contact lens such as a hydrated hydrogel lens having a variegated iris pattern is prepared by forming an iris pattern on the lens with a viscous paste which can contain an unoxidized vat dye. The lens is treated with a developer solution to obtain a tinted lens having an iris pattern which can be clear or different in color or in hue from the surrounding iris area. | |
