Patents by Inventor Josef Bognar

Josef Bognar 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).

  • Cast iron with spheroidal graphite and austenitic-bainitic mixed structure
    Patent number: 4541878
    Abstract: A high ductility machinable cast iron with mixed austenitic-bainitic structure is made by a method which involves limiting the manganese content to less than 0.3% by weight and utilizing a substantially lower temperature austenitizing heat treatment (820.degree. to 830.degree. C.) for a shorter period (10 to 25 minutes) than has hitherto been considered to be necessary to achieve such structures. The low alloy cast iron can therefore be made from available scrap with low manganese content and at low cost.
    Type: Grant
    Filed: December 16, 1983
    Date of Patent: September 17, 1985
    Assignee: Horst Muhlberger
    Inventors: Horst Muhlberger, Bruno Prinz, Wolf Wunder, Ulrich Schafer, Josef Bognar