Patents by Inventor Li-Chien Hsu

Li-Chien Hsu 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).

  • Hydrophobic filter material and method
    Patent number: 4731260
    Abstract: A filter material comprising hydrophobic filter media treated with a wetting agent which consists essentially of a material selected from the group consisting of polysobate 20, polysorbate 40, polysorbate 60 and polysorbate 80. The wetting agent is applied by dissolving it in a solvent and spraying the resulting solution onto the filter media.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: March 15, 1988
    Assignee: American Hospital Supply Corporation
    Inventors: David P. Balding, Li-Chien Hsu, Sun De Tong, Steven A. Craw
  • Dye silane compositions
    Patent number: 4714770
    Abstract: The preparation of dye-silane compositions are disclosed. A dye-silane compound is formed in which the dye is covalently bonded to a cyano silane compound. These dye-silane polymer compositions have particular utility as dye adduct reactants in the preparation of dye containing polysiloxanes.
    Type: Grant
    Filed: January 5, 1987
    Date of Patent: December 22, 1987
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Li-Chien Hsu, Hal Heitzmann
  • Dye containing silicon polymer composition
    Patent number: 4712865
    Abstract: A preparation of dye-containing gas permeable silicon polymer and resin compositions are disclosed. Homopolymers and/or co-polymers of polysiloxane are formed in which a photoactive center substituent containing a dye is covalently bonded to the matrix structure thereby rendering the dye non-diffusible. These dye-silicone polymer compositions have particular utility in gas sensing fiber optics devices.
    Type: Grant
    Filed: January 5, 1987
    Date of Patent: December 15, 1987
    Assignee: Baxter Travenol Laboratories
    Inventors: Li-chien Hsu, Hal Heitzmann
  • Stress crack reduction in polycarbonate parts
    Patent number: 4640819
    Abstract: Stress cracking of polycarbonate parts during prolonged storage while assembled with plasticized polyvinyl tubing is greatly reduced by using tubing in which tri-2-ethylhexyl trimellitate is the predominant or sole primary plasticizer.
    Type: Grant
    Filed: June 19, 1985
    Date of Patent: February 3, 1987
    Assignee: American Hospital Supply Corporation
    Inventors: David P. Balding, Li-Chien Hsu, Lucas S. Gordon