Patents by Inventor Patrick S. L. Wong

Patrick S. L. Wong 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).

  • Patent number: 6146662
    Abstract: A dosage form is disclosed comprising means for delaying the delivery of drug from the dosage form following the administration of the dosage form to a patient in need of drug therapy.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 14, 2000
    Assignee: ALZA Corporation
    Inventors: Frank Jao, Patrick S.-L. Wong, Hoa T. Huynh, Kathy Mc Chesney, Pamela K. Wat
  • Patent number: 6120803
    Abstract: The present invention is directed to an active agent dosage form which is adapted for retention in the stomach and useful for the prolonged delivery of an active agent formulation to a fluid environment of use. The active agent dosage form is a polymer matrix that swells upon contact with the fluids of the stomach. A portion of the polymer matrix is surrounded by a band of insoluble material that prevents the covered portion of the polymer matrix from swelling and provides a segment of the dosage form that is of sufficient rigidity to withstand the contractions of the stomach and delay expulsion of the dosage form from the stomach until substantially all of the active agent has been dispensed.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: September 19, 2000
    Assignee: ALZA Corporation
    Inventors: Patrick S. L. Wong, Liang-Chang Dong, David E. Edgren, Felix Theeuwes, Phyllis I. Gardner, Francisco Jao, Jason J. Wan
  • Patent number: 6106845
    Abstract: The present invention is directed to an oral active agent delivery system and method for delivering discrete units of an active agent formulation to a patient. An active agent formulation chamber containing the active agent formulation and having a fluid passing active agent formulation retainer is placed at a first end into a fluid and at a second end into a patient's mouth. The active agent is delivered when the patient sips on the second end of the chamber.
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: August 22, 2000
    Assignee: ALZA Corporation
    Inventors: Patrick S. -L. Wong, Howard B. Rosen, Nathan Roth, Phyllis I. Gardner
  • Patent number: 6103265
    Abstract: The present invention is directed to an oral active agent delivery system comprising improved flow controllers. A hollow tubular member (10) containing the active agent formulation and having a fluid passing controller (14) is placed at one end (16) into a fluid and at a second end (18) into a patient's mouth. The active agent is delivered when the patient sips on the end of the chamber. The improved controllers prevent leakage of the active agent formulation.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: August 15, 2000
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, Vincent J. Ferrari, Jeffrey W. Etter, Miriam A. Martin, Nathan Roth, Christopher M. G. Ohms, Andrew I. Poutiatine, James Horvath
  • Patent number: 6096339
    Abstract: The invention disclosed pertains to a dosage form comprising an agent formulation comprising drug and pharmaceutical carrier of cooperating particle size and means for dispensing the agent formulation from the dosage form.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: August 1, 2000
    Assignee: ALZA Corporation
    Inventors: Atul D. Ayer, Andrew Lam, Judy A. Magruder, Lawrence G. Hamel, Patrick S. L. Wong
  • Patent number: 6096003
    Abstract: The present invention is directed to a closure system for an oral active agent delivery device. The device comprises an elongate tubular member having first and second ends. The closure system includes a deformable closure means adapted to allow delivery of the active agent upon deformation. The closure system prevents spillage and maintains the integrity of the dose within the device. In use, the closure system is deformed and separated from the second end of the tubular member, liquid is drawn up into the first end of the member, and the liquid and active agent are drawn out of the second end of the member and into the patient's mouth.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: August 1, 2000
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, James Horvath, Radomir N. M. Vukadin, Joyce C. Anthony, Vincent J. Ferrari, Jeffrey W. Etter, Christopher M. G. Ohms
  • Patent number: 6036973
    Abstract: A dosage form is disclosed for administering 10 ng to 1200 mg tacrine to a patient in need of tacrine therapy.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: March 14, 2000
    Assignee: ALZA Corporation
    Inventors: George V. Guittard, Jerry D. Childers, Patrick S.-L. Wong, Fernando E. Gumucio, David J. Kidney
  • Patent number: 6024721
    Abstract: The present invention is directed to a mixing system for an active agent delivery device. The device comprises an elongate tubular member having first and second ends and a mixing system. The mixing system enables the entire dose of active agent to be entrained in a liquid. In use, liquid is drawn into the first end of the device, the mixing system mixes the liquid and active agent within the device and the active agent entrained in the liquid is drawn out of the second end of the member and into the patient's mouth.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: February 15, 2000
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, Stephen S. Hwang, Vincent J. Ferrari
  • Patent number: 6020000
    Abstract: The present invention is directed to an active agent dosage form that is useful for the prolonged delivery of an active agent formulation to a fluid environment of use. The active agent dosage form is a matrix that has an insoluble material circumscribing a portion of the surface of the matrix. The invention is also directed to a method of making the active agent dosage form.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: February 1, 2000
    Assignee: ALZA Corporatiton
    Inventors: Patrick S.-L. Wong, David Emil Edgren, Liang C. Dong, Vincent Joseph Ferrari
  • Patent number: 6008187
    Abstract: The present invention is directed to a pharmaceutical formulation of a therapeutic polypeptide together with a permeation-enhancing mixture of sodium salicylate and an oil to provide enhanced absorption of the polypeptide through the wall of the gastrointestinal tract, and particularly of the colon, after oral administration, the amount of oil being from about 10 wt % to about 30 wt %, preferably from about 15 wt % to about 25 wt %, of the total formulation and the amount of sodium salicylate being from about 70 wt % to about 90 wt %, preferably from about 75 wt % to about 85 wt %, of the total formulation. The polypeptide may be non-lyophilized. The pharmaceutical formulation is characterized as a solid, which provides a convenient and improved format for handling and storage and for the preparation of oral dosage forms (such as pills, capsules and delivery vessels) containing a homogeneous mixture of ingredients.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: December 28, 1999
    Assignee: Alza Corporation
    Inventors: Heechung Yang, Vu Anh Nguyen, Liang C. Dong, Patrick S. L. Wong
  • Patent number: 5989590
    Abstract: The present invention is directed to an oral active agent delivery system and method for delivering discrete units of an active agent formulation to a patient. An active agent formulation chamber containing the active agent formulation and having a fluid passing active agent formulation retainer is placed at one end into a fluid and at a second end into a patient's mouth. The active agent is delivered when the patient sips on the end of the chamber.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: November 23, 1999
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, Howard B. Rosen, Nathan Roth, Phyllis I. Gardner
  • Patent number: 5985324
    Abstract: The present invention is directed to an oral active agent delivery system comprising improved flow controllers. A hollow tubular member (10) containing the active agent formulation and having a fluid passing controller (14) is placed at one end (16) into a fluid and at a second end (18) into a patient's mouth. The active agent is delivered when the patient sips on the end of the chamber. The improved controllers prevent leakage of the active agent formulation.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: November 16, 1999
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, Vincent J. Ferrari, Jeffrey W. Etter, Miriam A. Martin, Nathan Roth, Christopher M. G. Ohms, Andrew I. Poutiatine, James Horvath
  • Patent number: 5980943
    Abstract: This invention pertains to a dosage form for the management of epilepsies wherein the dosage form comprises administering valproic acid or a valproic acid derivative at a continuous rate over an extended time.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: November 9, 1999
    Assignee: Alza Corporation
    Inventors: Atul Devatt Ayer, Richard L.-C. Yien, Brenda J. Pollock, Patrick S.-L. Wong
  • Patent number: 5955103
    Abstract: A dosage form is disclosed for delivering an antiepileptic drug, which dosage form comprises a laminated wall for maintaining the integrity of the dosage form and of the antiepileptic drug.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: September 21, 1999
    Assignee: ALZA Corporation
    Inventors: Frank Jao, Patrick S. -L. Wong, Evangeline Cruz, Eduardo C. Sy, Anthony L. Kuczynski
  • Patent number: 5938654
    Abstract: A dispenser for use in a fluid environment of use which is capable of the delivery of one or a plurality of discrete active agent-containing units in any desired delivery pattern or profile. It also can provide for the initially delayed delivery of an active agent to the environment of use and for high accuracy in the timing of delivery of the active agent.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: August 17, 1999
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
  • Patent number: 5910321
    Abstract: The present invention is directed to an oral active agent delivery system and method for delivering discrete units of an active agent to a patient. An elongate tubular member having first and second ends comprises first and second flow paths. Either or both of said flow paths contains an active agent. Liquid is drawn up into the first end of the member, and the liquid and active agent is drawn out of the second end of the member and into the patient's mouth.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: June 8, 1999
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, Nathan Roth, Vincent J. Ferrari
  • Patent number: 5906832
    Abstract: A dosage form is disclosed for delivering an antiepileptic drug, which dosage form comprises for maintaining the integrity of the dosage form and of the antiepileptic drug.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: May 25, 1999
    Assignee: ALZA Corporation
    Inventors: Frank Jao, Patrick S.-L. Wong, Evangeline Cruz, Eduardo C. Sy, Anthony L. Kuczynski
  • 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
  • Patent number: 5897878
    Abstract: A dosage form is disclosed comprising means for lessening the tackiness and/or irritation of the components of the dosage form to mucosal tissue. The dosage form provides means for forming in the dosage form a floc comprising a drug, which floc, when delivered from the dosage form, lessens the tackiness and/or irritation of the mucosal tissue of a warm-blooded recipient.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: April 27, 1999
    Assignee: ALZA Corporation
    Inventors: Liang C. Dong, Michael H. Dealey, Terry L. Burkoth, Patrick S.-L. Wong, Jerry D. Childers, Brian L. Barclay
  • Patent number: 5876750
    Abstract: A dosage form is disclosed for delivering an antiepileptic drug, which dosage form comprises a laminated wall for maintaining the integrity of the dosage form and of the antiepileptic drug.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: March 2, 1999
    Assignee: ALZA Corporation
    Inventors: Frank Jao, Patrick S.-L. Wong, Evangeline Cruz, Eduardo C. Sy, Anthony L. Kuczynski