Patents by Inventor Ludwig John

Ludwig John 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).

  • Electromagnetic casting apparatus
    Patent number: 4004631
    Abstract: The invention relates to an electromagnetic casting apparatus having an annular coolant jacket wherein a ring-type electromagnetic inductor is employed as the innermost wall of the coolant jacket and the inductor is preferably provided with conduits to direct coolant from within the coolant jacket onto the metal being cast.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: January 25, 1977
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventors: David G. Goodrich, Ludwig John
  • Electromagnetic casting apparatus
    Patent number: 3985179
    Abstract: An electromagnetic casting apparatus wherein a ring-type inductor generates an electromagnetic field having a flux density which diminishes in intensity toward the top of the inductor to more efficiently control the shape of the molten metal within the inductor.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: October 21, 1976
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventors: David G. Goodrich, Ludwig John