Patents by Inventor Woon H. Baek

Woon H. Baek 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).

  • Repeated sintering of tungsten based heavy alloys for improved impact toughness
    Patent number: 5294269
    Abstract: A method for heat-treatment of tungsten based alloys, capable of improving impact toughness while keeping tensile strength and elongation. The method comprises maintaining a sintered tungsten based alloy consisting of 86 to 99 weight % tungsten and the balance at least one selected from a group consisting of nickel, iron, copper, cobalt and molybdenum, at a temperature ranged from 950.degree. to 1,350.degree. C. for a maintenance time of one minute to 24 hours, quenching the sintered alloy in water or in oil, and repeating the maintaining and quenching steps.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: March 15, 1994
    Assignees: Poongsan Corporation, Agency for Defense Development
    Inventors: Young M. Lee, Kyung J. Park, Kil S. Churn, Woon H. Baek, Heung S. Song, Joon W. Noh, Moon L. Hong, Seong Lee, Eun P. Kim