Patents by Inventor Jackson Yu

Jackson Yu 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).

  • Process and apparatus for purifying elemental sulfur carried in an aqueous cake
    Patent number: 5049370
    Abstract: A cake containing sulfur and other materials in a base solvent, such as that resulting from a liquid redox hydrogen sulfide removal process, is purified to obtain elemental sulfur by preferential solubilization of the sulfur, employing a selected solvent immiscible with the base solvent at an elevated temperature less than that required to produce a phase change. The base and selected solvents are then separated, and the temperature of the sulfur solvent is lowered to recrystalize elemental sulfur.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: September 17, 1991
    Assignee: Ultraclean Incorporated
    Inventors: Nobuyasu Hasebe, Jackson Yu
  • Magnetic tape storage drawer
    Patent number: D287907
    Type: Grant
    Filed: July 10, 1984
    Date of Patent: January 27, 1987
    Assignee: Worthy Industrial Inc.
    Inventor: Jackson Yu
  • Combined digital watch and lighter
    Patent number: D303721
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: September 26, 1989
    Assignee: W. & Y. Taiwan Co., Ltd.
    Inventor: Jackson Yu