Patents by Inventor Karl E. Arvidsson

Karl E. 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: RE30658
    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: November 1, 1978
    Date of Patent: June 30, 1981
    Inventor: Karl E. Arvidsson