Patents by Inventor Tatjana Zlatina

Tatjana Zlatina 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 of hardening metal surfaces
    Patent number: 5217748
    Abstract: A coating is provided to a substrate in a vacuum chamber having an electric arc evaporator to form an ion-plasma comprising accelerated ions and neutral atoms of evaporated metal. The substrate contained in the vacuum chamber is provided with a negative voltage bias such that the ion-plasma is drawn to the substrate and deposited on its surface to provide the coating. A pulsed negative voltage bias is maintained on the substrate such that the substrate temperature can be maintained within the range of zero to 200.degree. C.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 8, 1993
    Assignee: Development Products, Inc.
    Inventors: Vladimir N. Kestelman, Tatjana Zlatina