Patents by Inventor Edwin J. Westerman

Edwin J. Westerman 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).

  • Patent number: 4722872
    Abstract: A magnetic memory disk substrate which maintains a high degree of surface smoothness together with high yield strength is prepared by cladding a core material with a cladding layer containing a maximum of about 3% magnesium. The core material is aluminum alloyed with one or more elements such as zinc, magnesium, copper and silicon to produce an improved yield strength. The cladding comprises from about 3% to about 10% per side of the thickness of the entire composite and generally contains further alloying elements for enhanced corrosion resistance. Silicon impurities generally amount to less than 0.5%.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: February 2, 1988
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Edwin J. Westerman
  • Patent number: 4699672
    Abstract: Computer memory disk substrates which can be age hardened to a high yield strength after thermal flattening and yet are essentially free of magnesium silicide constituents detrimental to surface smoothness are prepared by replacing a portion of the magnesium usually includes in high amounts as an alloying element with zinc.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: October 13, 1987
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Edwin J. Westerman