Patents by Inventor Chulho Kwon

Chulho Kwon 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).

  • Patent number: 6444267
    Abstract: A method for manufacturing a gravure transfer-coated continuous metal plate, wound in the form of a coil, comprising: coating, over the metal plate, a primer coating material; curing the primer coating material to form a lower coating layer; thermally transferring a desired pattern from a gravure transfer sheet onto the lower coating layer, thereby forming a transfer coating; coating, over the transfer coating, an upper coating material of thermosetting fluorine resin, thermosetting polyester resin, or UV-thermosetting polyurethane-acryl-based resin; and curing the upper coating material to form an upper coating layer. The primer coating material consists essentially of: 20-40% polyester resin having a number average molecular weight of 5,000-20,000 and a glass transition temperature of 10-50° C., 4-15% melamine resin, 1-10% urethane resin, 0.3-3% isocyanate, 15-35% pigment 30-50% hydrocarbon/ester-based mixed solvent, and 1.5-3% additives.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: September 3, 2002
    Assignee: Union Steel Manufacturing Co., Ltd.
    Inventors: Janghyun Choi, Sungsu Jeon, Sungkwon Ahn, Chulho Kwon