Patents by Inventor Andrew T. Hu

Andrew T. Hu 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 for preparing a porous polyurethane vascular graft prosthesis
    Patent number: 5462704
    Abstract: A porous polyurethane tube suitable for use as a vascular graft prosthesis is prepared by placing solvent type polyurethane resin coated mandrel in a static coagulant consisting of water, ethanol and optionally aprotic solvent within 30 seconds immediately after the coating step, separating the tube by placing the mandrel in a swelling agent containing at least 90 percent by weight of ethanol and rinsing with a solution containing at least 80 percent by weight ethanol.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: October 31, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Jui-Hsiang Chen, Jeng Wei, Andrew T. Hu, Yu-Der Lee, Ru-Fong Laiw, Muh-Lan Chen, Chung-Yi Chang, Fan-Yen Lee, Shu-Fang Jiang
  • Synthetic fibers containing photochromic pigment and their preparation
    Patent number: 5422181
    Abstract: Synthetic textiles containing a photochromic pigment. The pigments are prepared by encapsulating a photochromic pigment in a thermoplastic polymer having a high melt flow index, mixed with a primary thermoplastic resin, and extruded at a temperature of less than 250.degree. C. through a spinnerette having a diameter of at least 0.3 mm.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: June 6, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Yean-Rong Hwu, Chi-Chung Bai, Li-Chang Tao, Der-Guey Luo, Andrew T. Hu
  • Method of making synthetic fibers containing photochromic pigment
    Patent number: 5213733
    Abstract: Synthetic textiles containing a photochromic pigment. The pigments are prepared by encapsulating a photochromic pigment in a thermoplastic polymer having a high melt flow index, mixed with a primary thermoplastic resin, and extruded at a temperature of less than 250.degree. C. through a spinnerette having a diameter of at least 0.3 ml.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Industrial Technology Research Institute
    Inventors: Yean-Rong Hwu, Chi-Chung Bai, Li-Chang Tao, Der-Guey Luo, Andrew T. Hu