Patents by Inventor Seung-Yon Cho

Seung-Yon Cho 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: 6843930
    Abstract: There is provided a composition of refrigerant mixtures for high back pressure condition, comprising propane, propylene or 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon dioxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting HCFC-22 refrigerant without any systemic change.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: January 18, 2005
    Assignee: ACM Tech
    Inventor: Seung-Yon Cho
  • Publication number: 20040021124
    Abstract: There is provided a composition of refrigerant mixtures for high back pressure condition, comprising propane, propylene or 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon dioxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting HCFC-22 refrigerant without any systemic change.
    Type: Application
    Filed: March 5, 2003
    Publication date: February 5, 2004
    Inventor: Seung-Yon Cho
  • Patent number: 6649079
    Abstract: There is provided a composition of refrigerant mixtures for low back pressure condition, comprising isobutane, 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon oxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting CFC-12 refrigerant without any systemic change.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: November 18, 2003
    Assignee: ACM Tech
    Inventor: Seung-Yon Cho
  • Publication number: 20030178597
    Abstract: There is provided a composition of refrigerant mixtures for low back pressure condition, comprising isobutane, 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon oxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting CFC-12 refrigerant without any systemic change.
    Type: Application
    Filed: March 5, 2003
    Publication date: September 25, 2003
    Inventor: Seung-Yon Cho