Patents by Inventor Melvin M. Willis

Melvin M. Willis 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).

  • Binder for alumina containing refractories
    Patent number: 4030936
    Abstract: A refractory composition is disclosed herein comprising an alumina-containing refractory mix and a phosphoric acid type binder. The binder contains sodium sulfate and aluminum sulfate in addition to phosphoric acid or its precursor such as phosphorous pentoxide.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: June 21, 1977
    Inventor: Melvin M. Willis