Patents by Inventor Jen-Hua Chung

Jen-Hua 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).

  • Optical recording medium comprising phthalocyanines substituted by bicyclio-alkoxy groups
    Patent number: 6348250
    Abstract: An optical recording medium is provided that includes a spirally grooved polymer substrate, a recording layer, a reflecting layer, and a protection layer. The recording layer includes one or a mixture of phthalocyanine dyes. The phthalocyanine dye includes a bicyclo-alkyl substituent, providing solubility in any of a plurality of solvents that will not damage the surface of the substrate.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: February 19, 2002
    Assignee: Ritek Corporation
    Inventors: Shyh-Yeu Wang, Jen-Hua Chung, Chwei-Jing Yeh