Patents Assigned to Marc F. Fiedler
  • Patent number: 4077390
    Abstract: A heat pack is made by enclosing supercoolable aqueous sodium acetate solution together with a metallic activator strip in a sealed, flexible container. The activator strip is a flexible metal strip having one or more fissures or slits extending therethrough.To prepare the heat pack for activation, its contents are first heated to a temperature above the melting point of sodium acetate to completely melt it. Thereafter, the sodium acetate solution is supercooled. Activation or crystallization of the sodium acetate (with evolution of heat) is produced by bending the activator strip.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: March 7, 1978
    Assignees: Marc F. Fiedler, Herman Siegel
    Inventors: Joseph Stanley, Griffith L. Hoerner