Patents by Inventor Seung Chol Chung

Seung Chol Chung 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).

  • Method of heat treatment for steel
    Patent number: 5944916
    Abstract: A method of heat treating steel for use in transmission gears of a vehicle including the steps of carburizing the steel to 900-950.degree. C. quenching the carburizing steel at 830-850.degree. C., reheating the steel with ammonia gas to a temperature of 800-900.degree. C., and fusing the reheated steel at a temperature of 150-230.degree. C. for providing excellent anti-abrasion, contact fatigue strength and blending fatigue strength properties, thereby controlling the quality of steel in a furnace.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: August 31, 1999
    Assignee: Hyundai Motor Company, Ltd.
    Inventor: Seung Chol Chung