Patents by Inventor Jeoung-Kyu Lee

Jeoung-Kyu Lee 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 for extracting an oil content from oil shale
    Patent number: 4304656
    Abstract: A method for extracting an oil content from oil shale by compressing powdery grains of oil shale while applying ultrasonic waves to these powdery grains to separate the oil content from the powdery grains of oil shale.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: December 8, 1981
    Inventor: Jeoung-Kyu Lee