Patents Assigned to Whitehead Brothers Company
  • Additive for green molding sand
    Patent number: 4131476
    Abstract: Salts of lithium or magnesium and an organic carboxylic acid, especially lithium acetate and/or magnesium acetate, are added to green molding sand to improve the properties of hot green molding sand at 110-160.degree. F (43.3-71.1.degree. C). Magnesium acetate is preferred, especially in green molding sands used for casting steel.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: December 26, 1978
    Assignee: Whitehead Brothers Company
    Inventors: Ronald E. Melcher, Frederick W. Schaefer