Patents by Inventor Fritz Schaefer

Fritz Schaefer 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).

  • Metal treatment agents
    Patent number: 4849165
    Abstract: Metallurgical treatment agents for molten ferrous metals e.g. iron and steel and suitable for e.g. desulphurizing molten iron and steel comprise particulate magnesium coated with a first coating of a hydrophobic compound and a second coating of a particulate refractory material. The coated magnesium possesses improved flowability and is less prone to premature reaction when subjected to a high temperatures. The hydrophobic compound provides the magnesium with enhanced protection against hydration than may be obtained by a refractory coating alone.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: July 18, 1989
    Assignee: Foseco International Limited
    Inventor: Fritz Schaefer