Patents by Inventor Snorre RIST

Snorre RIST 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 and equipment for suppressing discoloration of Al—Mg products
    Patent number: 11453938
    Abstract: Method and means for suppressing discoloration during thermal treatment of a product of a magnesium containing aluminium alloy, the alloy contains in wt. % Mg: 0.45-12.0, with a preferred range of 0.45-6.0 wt %. The product, being either an extrusion billet, a sheet ingot, a cast product, or a forged product is heated to a temperature T where it is prone to surface discoloration and oxidation, wherein during the thermal treatment it is exposed to a suppressing atmosphere comprising 0.5-5.0% CO2 gas with a preference for 0.5-1.5% CO2 gas.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: September 27, 2022
    Assignee: NORSK HYDRO ASA
    Inventors: Alf Inge Romfo, Snorre Rist, Idar Kjetil Steen, Geir Øyen, Øystein Bauger, Oddvin Reiso, Tanja Pettersen
  • METHOD FOR AND EQUIPMENT FOR SUPPRESSING DISCOLORATION OF AL-MG PRODUCTS
    Publication number: 20200232080
    Abstract: Method and means for suppressing discoloration during thermal treatment of a product of a magnesium containing aluminium alloy, the alloy contains in wt. % Mg: 0.45-12.0, with a preferred range of 0.45-6.0 wt %. The product, being either an extrusion billet, a sheet ingot, a cast product, or a forged product is heated to a temperature T where it is prone to surface discoloration and oxidation, wherein during the thermal treatment it is exposed to a suppressing atmosphere comprising 0.5-5.0% CO2 gas with a preference for 0.5-1.5% CO2 gas. FIG.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 23, 2020
    Applicant: NORSK HYDRO ASA
    Inventors: Alf Inge ROMFO, Snorre RIST, Idar Kjetil STEEN, Geir ØYEN, Øystein BAUGER, Oddvin REISO, Tanja PETTERSEN