Patents by Inventor Young Sy Han

Young Sy Han 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).

  • HEAT TREATMENT METHOD OF UNLEADED BRASS ALLOY
    Publication number: 20130255845
    Abstract: A heat treatment method for unleaded brass alloy is provided to improve processability, cracking resistance, wear resistance and anti-corrosive property of unleaded brass alloy containing no lead or containing a very small amount of lead. The heat treatment method includes full annealing an unleaded brass alloy material, mechanical processing the material after full annealing and soft annealing the material after mechanical processing.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 3, 2013
    Inventors: Kwang Jin Park, Jae Kil Shim, Young Sy Han, Kyung Hwan Yoon, Sung Ki Ahn