Patents by Inventor George Kohan

George Kohan 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).

  • Patent number: 6319433
    Abstract: A method of forming an ophthalmic lens using a composite ophthalmic lens vacuum mold to quickly and inexpensively produce, on-site, multi-focal, prescription and non-prescription optical quality eyeglasses, with or without photochromic, and photochromic non-prescription (e.g., sunglasses, safety glasses, reading glasses, etc.) optical quality eyeglass via a vacuum remolding. The method further includes a rigid remolding process for forming the composite ophthalmic lens.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: November 20, 2001
    Assignee: Invicta Corporation
    Inventor: George Kohan
  • Patent number: 5975696
    Abstract: Methods for quickly and inexpensively producing photochromic non-prescription (e.g., sunglasses, safety glasses, reading glasses, etc.), prescription, multifocal and progressive plastic optical quality eyeglass, and more particularly, a simple and inexpensive yet rapid and high quality method for rendering one or both surfaces of a lens photochromic. The invention further concerns lenses produced by the method.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: November 2, 1999
    Inventor: George Kohan
  • Patent number: 5851328
    Abstract: Methods for quickly and inexpensively producing photochromic non-prescription (e.g., sunglasses, safety glasses, reading glasses, etc.), prescription, multifocal and progressive plastic optical quality eyeglass. The lenses are formed by a process wherein a thin wafer lens is deformed to assume the curvature of a base lens. Deformation may be by heat treatment and application of pressure while adhering the wafer lens against a base lens. The invention further concerns lenses produced by the methods. The lenses are characterized by an extremely rapid photochromic response.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: December 22, 1998
    Inventor: George Kohan
  • Patent number: 5743920
    Abstract: A safe, neat and more convenient process for tinting plastic optical lens substrates is provided by a novel packaging system. The tint dyes are provided in a water-soluble tint packet for the convenient preparation of solutions for tinting optical lens substrates. The tint packet has an indefinite shelf life, is stable even in summer temperatures and high humidity, protects the user from any contact with the dye material, and does not leave solid waste for disposal.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: April 28, 1998
    Inventor: George Kohan