Patents by Inventor Yu-Lan Tung

Yu-Lan Tung 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).

  • Nano-gold catalyst and process for preparing the same
    Patent number: 6911413
    Abstract: The present invention discloses a nano-gold catalyst including a solid carrier and gold deposited on the carrier, wherein the deposited gold has a size less than 10 nm, and the carrier is a mixed metal hydroxide and oxide having the following formula: M(OH)qOy Wherein M is Ti, Fe, Co, Zr, or Ni; q is 0.1-1.5; and q+2y=z, wherein z is the valence of M. The present invention also discloses a preparation process of the nano-gold catalyst.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: June 28, 2005
    Assignee: Industrial Technology Research Institute
    Inventors: Kuo-Ching Wu, Yu-Lan Tung, Chu-Chang Dai
  • Nano-gold catalyst and process for preparing the same
    Publication number: 20040127353
    Abstract: The present invention discloses a nano-gold catalyst including a solid carrier and gold deposited on the carrier, wherein the deposited gold has a size less than 10 nm, and the carrier is a mixed metal hydroxide and oxide having the following formula:
    Type: Application
    Filed: June 16, 2003
    Publication date: July 1, 2004
    Applicant: Industrial Technology Research Institute
    Inventors: Kuo-Ching Wu, Yu-Lan Tung, Chu-Chang Dai
  • Method for producing maleimides
    Patent number: 6630595
    Abstract: A method for producing maleimides. The method comprises reacting maleic anhydride and a primary amine at 100-180° C. in an organic solvent using a solid acidic catalyst, and purifying the maleimide produced therefrom by extraction and crystallization. The molar ratio of the primary amine to maleic anhydride is about 0.8-1.6. With the present invention, high production yield with high purity of maleimides can be achieved. In addition, the solid acidic catalyst can be easily separated and recycled for subsequent use. Thus, the present invention provides a number of distinct advantages, including substantially improved yield, conveniently reusable catalyst, reduced waste disposal and lower costs.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: October 7, 2003
    Assignee: Industrial Technology Research Institute
    Inventors: Kuo-Ching Wu, Yu-Lan Tung, Chiou-Hwang Lee, Jyh-Chang Dai, Chiung-Hui Huang
  • METHOD FOR PRODUCING MALEIMIDES
    Publication number: 20030105337
    Abstract: A method for producing maleimides. The method comprises reacting maleic anhydride and a primary amine at 100-180° C. in an organic solvent using a solid acidic catalyst, and purifying the maleimide produced therefrom by extraction and crystallization. The molar ratio of the primary amine to maleic anhydride is about 0.8-1.6. With the present invention, high production yield with high purity of maleimides can be achieved. In addition, the solid acidic catalyst can be easily separated and recycled for subsequent use. Thus, the present invention provides a number of distinct advantages, including substantially improved yield, conveniently reusable catalyst, reduced waste disposal and lower costs.
    Type: Application
    Filed: June 4, 2002
    Publication date: June 5, 2003
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Kuo-Ching Wu, Yu-Lan Tung, Chiou-Hwang Lee, Jyh-Chang Dai, Chiung-Hui Huang