Patents by Inventor Sigvard Bergh

Sigvard Bergh 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).

  • Ferritic chrome steels of high notched bar impact strength and method of making same
    Patent number: 4139377
    Abstract: A method for producing stabilized ferritic stainless chrome steels which are distinguished in the welded state by high notched bar impact strength, wherein in powder-metallurginal manner by atomizing melts of the said chrome steels under argon a powder is produced which is pressed and agglomerated in known manner and that the pressed bodies are finally brought by hot or cold working into the desired semi-finished product form, preferably sheet form.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: February 13, 1979
    Assignee: Granges Nyby AB
    Inventors: Sigvard Bergh, Goran Gemmel, Christer Aslund