Patents by Inventor Tsu Hsien Han

Tsu Hsien Han 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).

  • Soluble thermosetting polyethersulfone and making of them
    Patent number: 6355764
    Abstract: The invention provides a new soluble thermosetting polyethersulfone resin, which can dissolve in ether solvent such as THF and 1,4-Dioxane. The soluble thermosetting polyethersulfone resin can be introduced the unsaturated olefin functional group, after high temperature (>180° C.) curing the unsaturated olefin functional group gets high heat resistant polyethersulfone resin. The soluble thermosetting polyethersulfone resin is made by two steps reaction, the dihalodiphenylsulfone reacts with dihydroxy aromatic compound and dihydroxybenzoic acid to form carboxy group terminated polyethersulfone resin, then the carboxy group terminated polyethersulfone resin react with unsaturated olefin alcohol or glycidyl acrylate or their derivatives to make soluble thermosetting polyethersulfone resin.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: March 12, 2002
    Assignee: Lead Data Inc.
    Inventors: Shung-Yaw Hun, Fu-Kang Huang, Tsung-Yi Yeh, Tsu Hsien Han, Ro Ching Liu