Patents by Inventor Dmetro Andrychuk

Dmetro Andrychuk 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).

  • Method and apparatus for determining the facet angles of a gemstone
    Patent number: 5424830
    Abstract: A method and apparatus for determining the facet angles of a gemstone includes structure for rotatably mounting a gemstone along the optical axis of the gemstone. A collimated beam of light is directed toward a facet of the gemstone, such that the facet reflects light. A scale is mounted parallel to and spaced apart from the gemstone optical axis. The scale includes indicia indicating angular measurements, such that the facet reflected light impinges on the scale. The location of the facet reflected light on the scale indicia indicates the angle of the facet.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: June 13, 1995
    Inventor: Dmetro Andrychuk
  • Method for cutting ornamental transparent gemstones and products produced therefrom
    Patent number: 4083352
    Abstract: This invention relates generally to a method for systematically and accurately increasing the brilliance and depth of color of a gemstone without the need to determine the pavilion and facet angles by trial and error.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: April 11, 1978
    Inventor: Dmetro Andrychuk