Patents by Inventor Karl Ewald Arvidsson

Karl Ewald Arvidsson 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).

  • Apparatus for treating work pieces
    Patent number: 4007706
    Abstract: An apparatus for treating work pieces in a closed space having a collapsible material. The treatment utilizes a period of subpressure and a period of pressure, in which cavities in the pieces are more or less filled with liquid. Prior to this the cavities are wholly or partially filled with a surface-tension reducing gas and/or solution.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: February 15, 1977
    Inventor: Karl Ewald Arvidsson