Patents by Inventor Cheol H. Lee

Cheol H. Lee 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).

  • Higher order construction algorithm method for rapid prototyping
    Patent number: 5818718
    Abstract: A rapid prototype modeling system operates to first electronically decompose a discrete part represented by an STL file into electronic layers, using a paradigm characterized by a higher than zero order of fit with respect to the surface of the part. Physical layers are generated from the electronic layers by mechanical devices constructed and arranged to operate in accordance with the paradigm. The physical layers are then stacked appropriately to create a physical model of the discrete part.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: October 6, 1998
    Assignee: University of Utah Research Foundation
    Inventors: Charles L. Thomas, Cheol H. Lee, Srinivas Kaza, Thomas M. Gaffney
  • Method of preparation of 3-methylene cepham compounds
    Patent number: 4513134
    Abstract: A method for the preparation of 3-methylene cepham compounds which comprises reacting 3-halomethyl butenoate derivatives of thiazolinoazetidinone with an aqueous acid solution in a mixed organic solvent.
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: April 23, 1985
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Wan J. Kim, Cheol H. Lee, Moon H. Lee