Patents by Inventor Choo B. Lim

Choo B. Lim 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).

  • Effective cleaning method for turbine airfoils
    Patent number: 5575858
    Abstract: A cleaning method for gas turbine engine airfoils includes a step of autoclave process cleaning and a step of chelating agent solution cleaning. The cleaning method also includes water rinsing after the autoclave cleaning and after the chelating agent solution cleaning. A subsequent step of high pressure water jet spray removes the debris. The cleaning method of the present invention significantly reduces the number of cleaning cycles required to clean the airfoils.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: November 19, 1996
    Assignee: United Technologies Corporation
    Inventors: Otis Y. Chen, Kim C. Seow, Choo B. Lim