Patents by Inventor Yih-Yau Sun

Yih-Yau Sun 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 producing pseudoboehmite from aluminum salt solutions
    Patent number: 4297325
    Abstract: The production process for pseudoboehmite from leach liquors produced in the acid treatment of clays, which liquors contain Fe and alkaline earth ions.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: October 27, 1981
    Assignee: Filtrol Corporation
    Inventors: Julius Scherzer, Anh-Thu Liu, Yih-Yau Sun