Patents by Inventor Si-Hong Yum

Si-Hong Yum 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).

  • Pharmaceutical coating composition and method of use
    Patent number: 7087243
    Abstract: A composition is disclosed comprising a polymer and a surfactant in a solvent exhibiting a common solubility for the polymer and the surfactant. The composition provides a dosage form for administering a drug over time.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: August 8, 2006
    Inventors: David E. Edgren, Shu Li, Patrick S.-L. Wong, Gurdish Bhatti, Liang-Chang Dong, Si-Hong Yum
  • Pharmaceutical coating composition and method of use
    Patent number: 7060734
    Abstract: A composition is disclosed comprising a polymer and a surfactant in a solvent exhibiting a common solubility for the polymer and the surfactant. The composition provides a dosage form for administering a drug over time.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: June 13, 2006
    Assignee: Alza Corporation
    Inventors: David E. Edgren, Shu Li, Patrick S.-L. Wong, Gurdish Bhatti, Liang-Chang Dong, Si-Hong Yum
  • Controlled release dosage form including a banded engine
    Publication number: 20050186273
    Abstract: The present invention includes a dosage form configured to provide the controlled release of an active agent formulation. A dosage form according to the present invention includes a reservoir containing an active agent formulation and an engine positioned at least partially within the reservoir. In order to reduce the possibility that the engine included in a dosage form of the present invention will separate from the reservoir either during or after fabrication, the dosage form of the present invention includes a band that binds the engine to the reservoir. The band is provided over an outside surface of the both the engine and the reservoir at or near the interface formed where the engine enters the opening provided in the reservoir. The present invention also includes a method of fabricating controlled release dosage forms having banded engine.
    Type: Application
    Filed: September 24, 2004
    Publication date: August 25, 2005
    Inventors: Si-Hong Yum, Crystal Pollock-Dove, Liang-Chang Dong, Patrick Wong
  • Pharmaceutical coating composition and method of use
    Publication number: 20050003006
    Abstract: A composition is disclosed comprising a polymer and a surfactant in a solvent exhibiting a common solubility for the polymer and the surfactant. The composition provides a dosage form for administering a drug over time.
    Type: Application
    Filed: July 23, 2004
    Publication date: January 6, 2005
    Inventors: David Edgren, Shu Li, Patrick Wong, Gurdish Bhatti, Liang-Chang Dong, Si-Hong Yum
  • Dosage form providing ascending release of liquid formulation
    Publication number: 20040091538
    Abstract: The present invention includes a dosage form that releases a liquid active agent formulation over a period of time at an ascending rate. The dosage form of the present invention includes a capsule or other reservoir capable of containing a liquid active agent formulation, a driving means for expelling the liquid active agent formulation from the capsule over an extended period of time and a rate altering means for increasing the rate at which the driving means expels liquid active agent formulation from the capsule. The present invention also includes a method of manufacturing a controlled release dosage form providing the release of liquid active agent formulation at an ascending rate.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 13, 2004
    Inventors: Crystal Pollock-Dove, Liang Dong, Patrick S. L. Wong, Si-Hong Yum
  • Drug delivery device with minimal residual drug retention
    Patent number: 5902605
    Abstract: The present invention is directed to a fluid-imbibing drug delivery device which is useful for the initial delayed delivery of an active agent formulation to a fluid environment of use, the initial delay period to startup or activation of the device being of a predetermined length of time. The delivery of the agent formulation from the dispensing device is continued until essentially all of the active agent formulation is delivered as a result of the fluid inhibition into a fluid flow path in the housing of the device and the expansion of an expansion agent in the active agent delivery chamber.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: May 11, 1999
    Assignee: Alza Corporation
    Inventors: Liang C. Dong, Patrick S.-L. Wong, Si-Hong Yum, Crystal Pollock
  • Osmotic device with delayed activation of drug delivery and complete drug release
    Patent number: 5800422
    Abstract: The present invention is directed to a fluid-imbibing drug delivery device which is useful for the initial delayed delivery of an active agent formulation to a fluid environment of use, the initial delay period to startup or activation of the device being of a predetermined length of time. The delivery of the agent formulation from the dispensing device is continued until essentially all of the active agent formulation is delivered as a result of the expansion of an expansion agent in the active agent delivery chamber.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 1, 1998
    Assignee: Alza Corporation
    Inventors: Liang C. Dong, Patrick S.-L. Wong, Si-Hong A. Yum, Lawrence G. Hamel, Michael H. Dealey