Patents by Inventor Lars-Gosta von Dahn

Lars-Gosta von Dahn 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 the mechanical working of cast iron and an aqueous concentrate to be used in the method
    Patent number: 4564461
    Abstract: Mechanical working of cast iron is performed in the presence of an aqueous metalworking composition containing an organic copper (II) complex and an iron corrosion inhibitor. An aqueous concentrate, which after dilution with water is suitable for application in mechanical working of cast iron, contains 1-50% copper (II) complex with such a Cu.sup.2+ -content of 0.5-20%, 1-50% iron corrosion inhibitor, 0-50% lubricant, 0-20% pH-regulators, bactericides and solubilizing agents and 10-70% water.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: January 14, 1986
    Assignee: Berol Kemi AB
    Inventors: Rolf O. Skold, Lars-Gosta von Dahn, Anna K. Sterky