Patents by Inventor Soon O. Hwang

Soon O. Hwang 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).

  • Vapor state esterification using enzymes
    Patent number: 5541093
    Abstract: There is disclosed a method for the preparation of ester compound. It is distinguished by comprising reaction of an alcohol with an organic acid in the vapor state and at a temperature of 25.degree. to 55.degree. C., in the presence of lipase. Unlike production in aqueous solutions, the ester compounds prepared according to the method have no difficulty in separating from the reaction system because they are in the vapor state. Accordingly, the method is suitable for mass production.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: July 30, 1996
    Assignee: Yukong Ltd.
    Inventor: Soon O. Hwang