Patents by Inventor Insoon Chang

Insoon Chang 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).

  • Recovery or removal of uranium by the utilization of acorns
    Patent number: 4871518
    Abstract: This invention can treat a uranium-containing solution of high or low concentration and/or the waste generated from uranium conversion processes, etc. It is characterized by the use of acorns, nuts of oak tree, which can be easily obtained in our botanical system. By coprecipitating the uranium or other heavy metal elements with the extract of acorns, this invention can not only recover the uranium of other heavy metal elements but also can reduce them before being discharged to the environmental radioactivity level.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: October 3, 1989
    Assignee: Korea Advanced Energy Reasearch Institute
    Inventors: Myongwhan Yoon, Seongtae Whang, Insoon Chang, Pilsoon Han