Patents by Inventor Ren-Long Chu

Ren-Long Chu 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 fabricating an optical retardation film
    Patent number: 5743980
    Abstract: A method of fabricating an optical retardation film having single axis crystal. A polymer material such as polyvinyl alcohol, polystyrene, polycarbonate, or poly methylmethacrylate dissolved in an alkyl solvent forms a polymer solution. A coating of the solution is deposited on a glass substrate by means of a spin coater. The coated substrate is heated in an oven or a heating pad to dry the polymer film. The dried film separated from the glass substrate forms the optical retardation film.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: April 28, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Ting-Chiang Hsieh, Dong-Yuan Goang, Ren-Long Chu