Patents by Inventor Jung Han Sin

Jung Han Sin 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).

  • Solid drawing material
    Patent number: 7547355
    Abstract: A solid drawing material containing a gel-forming substance of an alkali metal salt or an ammonium salt of an aliphatic carboxylic acid having 8 to 36 carbon atoms, an alkoxylated nitrogen-containing compound, a reduced starch saccharide, and a coloring agent. The solid drawing material which is in the form of a stick features a large strength, a small drawing resistance, is less subject to be collapsed or broken, produces little shavings while drawing, makes it possible to favorably form a drawing even on smooth surfaces such as windowpanes, and of which the traces after drawn can be easily wiped out with a wet cloth.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: June 16, 2009
    Assignee: Buncho Corporation
    Inventors: Koji Seki, Jung Han Sin
  • SOLID DRAWING MATERIAL
    Publication number: 20070204760
    Abstract: A solid drawing material containing a gel-forming substance of an alkali metal salt or an ammonium salt of an aliphatic carboxylic acid having 8 to 36 carbon atoms, an alkoxylated nitrogen-containing compound, a reduced starch saccharide, and a coloring agent. The solid drawing material which is in the form of a stick features a large strength, a small drawing resistance, is less subject to be collapsed or broken, produces little shavings while drawing, makes it possible to favorably form a drawing even on smooth surfaces such as windowpanes, and of which the traces after drawn can be easily wiped out with a wet cloth.
    Type: Application
    Filed: September 11, 2006
    Publication date: September 6, 2007
    Inventors: Koji Seki, Jung Han Sin