Patents by Inventor Yu-Lee Hao

Yu-Lee Hao 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).

  • Depyrogenation of clinical albumin
    Patent number: 4791191
    Abstract: A simple method for the depyrogenation of clinical albumin is disclosed. It includes mixing the pyrogenic clinical albumin with human plasma, followed by a two-step albumin method reported previously by this inventor. The depyrogenated albumin, in the form of ethanol precipitate, can then be processed into clinical albumin according to the conventional procedures. This simple process not only results in the depyrogenation of the endotoxin--contaminated albumin, but also recovers the albumin which is present in the added plasma. The overall albumin yield is greater than 90% as calculated from the starting pyrogenic albumin and the albumin present in the added plasma.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: December 13, 1988
    Assignee: Plasmatech Corporation
    Inventor: Yu-Lee Hao
  • Isolation of an endotoxin inactivator from human plasma, and methods of use
    Patent number: 4780529
    Abstract: An endotoxin inactivator is isolated from human plasma by anion exchange (DEAE-Sephadex), dye-affinity (Cibracron Blue-Sepharose), and adsorption (on hydroxyapatite) chromatography. The endotoxin inactivator, isolated in essentially pure form, may be used to depyrogenate clinical blood products.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: October 25, 1988
    Assignee: Biotech Research Laboratories, Inc.
    Inventor: Yu-Lee Hao
  • Isolation of an endotoxin inactivator from human plasma
    Patent number: 4677194
    Abstract: An endotoxin inactivator is isolated from human plasma by anion exchange (DEAE-Sephadex), dye-affinity (Cibracron Blue-Sepharose), and adsorption (on hydroxyapatite) chromatography. The endotoxin inactivator, isolated in essentially pure form, may be used to depyrogenate clinical blood products.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: June 30, 1987
    Assignee: Biotech Research Laboratories, Inc.
    Inventor: Yu-Lee Hao