Patents Assigned to AB Westin and Backlund
  • Manufacturing moulds or mould cores
    Patent number: 4174225
    Abstract: A method for manufacturing casting molds or mold cores comprising shaping an aqueous mixture of sand, binder, a hydrocarbon resinous material and a porous, heat-resistant inorganic material.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: November 13, 1979
    Assignees: AB Nynas-Petroleum, AB Westin and Backlund
    Inventors: Bert K. G. Lundgren, Urban Westin