Patents by Inventor Israel Tchoukran

Israel Tchoukran has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Production of contact lenses
    Patent number: 4478770
    Abstract: The invention relates to a process for the production of a contact lens, which comprises coating a tool made of an inert material, having a curvature corresponding to that of one of the optical surfaces of the lens to be produced, with a layer of solid polymer, and machining the outer surface of said polymer to the desired curvature of the second surface of said lens while supported by said tool, and to a tool for carrying out such process.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: October 23, 1984
    Assignee: Yeda Research and Development Company, Ltd.
    Inventors: David Vofsi, Shymon Reich, Israel Tchoukran, Joaquin Mayoral