Patents by Inventor John Edward Scardefield

John Edward Scardefield 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).

  • Method of preparing .beta."-Al.sub.2 O.sub.3
    Patent number: 4024214
    Abstract: .beta."-Al.sub.2 O.sub.3 is a highly desirable material for serving the double function of solid electrolyte and separator in a rechargeable battery that employs sodium, Na, as the anode and sulfur, S, as the cathode. But conventional means for manufacturing the .beta."-Al.sub.2 O.sub.3 require temperatures between 1400.degree. and 1600.degree. C. By reacting .theta.-Al.sub.2 O.sub.3 with Na.sub.2 O, or a compound that yields Na.sub.2 O on decomposition, the desired .beta."-Al.sub.2 O.sub.3 is obtained at temperatures as low as 950.degree. C.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: May 17, 1977
    Assignee: International Business Machines Corporation
    Inventors: Luther Morris Foster, John Edward Scardefield