Patents by Inventor Fridrich Vazan

Fridrich Vazan 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).

  • Optical recording element and alloy for use therein
    Patent number: 4904577
    Abstract: There is disclosed an antimony, tin and indium alloy which contains an additional element. The additional element is selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium. The additional element substantially reduces arcing during the sputtering process used to make optical recording layers from the alloy.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: February 27, 1990
    Inventors: Yuan-Sheng Tyan, Pranab K. Raychaudhuri, Fridrich Vazan
  • Recording elements comprising write-once thin film alloy layers
    Patent number: 4865955
    Abstract: Optical recording and record elements are provided. The elements comprise a write-once amorphous thin-film optical recording layer of an alloy having a composition within a polygon in a ternary composition diagram of antimony, aluminum, and tin; wherein(a) the composition diagram is according to FIG.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: September 12, 1989
    Assignee: Eastman Kodak Company
    Inventors: Kee-Chuan Pan, Yuan-Sheng Tyan, Fridrich Vazan
  • Recording elements comprising write-once thin film alloy layers
    Patent number: 4798785
    Abstract: Optical recording and record elements are provided. The elements comprise a write-once amorphous thin-film optical recording layer of an alloy having a composition within a polygon in a ternary composition diagram of antimony, aluminum, and tin; wherein(a) the composition diagram is according to FIG.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: January 17, 1989
    Assignee: Eastman Kodak Company
    Inventors: Kee-Chuan Pan, Yuan-Sheng Tyan, Fridrich Vazan
  • Erasable optical recording method
    Patent number: 4797871
    Abstract: The method comprises the steps of:a. providing an optical recording element comprising an amorphous thin film of a GeTe alloy;b. preparing the thin film for writing and erasing cycles by crystallizing the film;c. writing on selected portions of the prepared film with modulated laser beam, thereby converting portions on the films to a phase-segregated amorphous state.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: January 10, 1989
    Assignee: Eastman Kodak Company
    Inventors: Yuan S. Tyan, Kee C. Pan, Fridrich Vazan