Patents by Inventor Per I. Andersson

Per I. Andersson 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 treating cemented carbide bodies regarding their compositions and structures
    Patent number: 4772339
    Abstract: The present invention relates to a unique and advantageous method making possible a superior technical and economical separation of cemented carbide bodies based upon their compositions and structures.The critical point of the method is, that after formation of a melt by melting of the binder metal including dissolved elements from the hard constituents there are so strong driving forces dependent on the grain size variables, proportions and compositions of the hard constituent phases, that melt is re-distributed between cemented carbide bodies in communicating contact. The re-distribution is determined by differences of mean grain sizes, grain size distributions, relative proportions and compositions of the hard constituent phases of the bodies.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: September 20, 1988
    Assignee: Santrade Limited
    Inventors: Carl S. G. Ekemar, Ulf E. Jutterstrom, Per I. Andersson