Patents by Inventor Pui-Ho C. Yuen

Pui-Ho C. Yuen 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).

  • Stable aqueous alfa interferon solution formulations
    Patent number: 5935566
    Abstract: Stable aqueous solution formulations containing alfa-interferon type interferon, e.g., interferon alfa-2a and interferon alfa-2b, a buffer to maintain the pH in the range of 4.5-7.1, polysorbate 80 as a stabilizer, edetate disodium as a chelating agent, sodium chloride as a tonicity agent, and m-cresol as an antimicrobial preservative and which maintain high chemical, physical and biological stability of the alfa-type interferon for an extended storage period of at least 24 months are disclosed.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: August 10, 1999
    Assignee: Schering Corporation
    Inventors: Pui-Ho C. Yuen, Douglas F. Kline
  • Stable, aqueous alfa interferon solution formulations
    Patent number: 5766582
    Abstract: Process for making stable aqueous solution formulations containing alfa-type interferon, e.g., interferon alfa-2a and interferon alfa-2b, a buffer to maintain the pH in the range of 4.5-7.1, polysorbate 80 as a stabilizer, edetate disodium as a chelating agent, sodium chloride as a tonicity agent, and m-cresol as an antimicrobial preservative and which maintain high chemical, physical and biological stability of the alfa interferon for an extended storage period of at least 24 months are disclosed.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: June 16, 1998
    Assignee: Schering Corporation
    Inventors: Pui-Ho C. Yuen, Douglas F. Kline