Patents by Inventor Hannu T. Pajala

Hannu T. Pajala 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 for manufacturing metal objects
    Patent number: 5119660
    Abstract: The invention relates to a method for manufacturing metal objects, particularly non-ferrous metal objects, by means of extrusion. According to the invention a casting with a cast structure is conducted at or about ambient temperature to the extrusion device, and the casting is subjected to extrusion, at a reduction ratio of at least 80%, within its recrystallization region. The extrusion is carried out according to the Conform method.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: June 9, 1992
    Assignee: Outokumpu Oy
    Inventors: Ilpo I. Koppinen, Hannu T. Pajala, Jukka V. A. Somerkoski