The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1989
Filed:
Jul. 17, 1989
Charles W Neefe, Big Spring, TX (US);
Sunsoft Corp., Albuerque, NM (US);
Abstract
The invention is a method of making a colored cosmetic lens that will change the color of a dark colored eye to a light color. This is achieved by masking the area which are not to be colored, the pupil and periphery beyond the iris. A solution containing a contact lens dye, an expanding or swelling agent and a precipitating agent is prepared. The water soluble precipitating agent is capable of forming an insoluble precipitant when properly reacted. The lens and mask fixture are immersed in the three part solution allowing the solution to swell and enter the surface of the lens iris area. The dye and precipitating agent enter the expanded lens iris area. The lens and mask fixture are transferred from the first three part solution to the second reaction precipitating solution. A colored insoluble precipitant is formed in the lens iris area. The lens is removed from the mask fixture and washed to remove all unreacted materials.