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: 5620705
    Abstract: A hormone replacement composition, a hormone replacement dosage form, and a method of hormone replacement are disclosed and indicated for the management of hormone replacement therapy.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: April 15, 1997
    Assignee: ALZA Corporation
    Inventors: Liang C. Dong, Patrick S.-L. Wong, Steven Espinal
  • Patent number: 5620700
    Abstract: The present invention is directed to a material which can be used to deliver a drug, such as an antibiotic, into a diseased tissue pocket, such as a periodontal pocket. The material is preferably a bioerodible oligomer or polymer. The oligomer or polymer containing the drug is heated and is then delivered, preferably by injection, into the tissue pocket at a physiologically compatible elevated temperature. Once the bioerodible material is injected into the pocket, the material cools to the body temperature of the pocket. As it cools, the material hardens and remains in place in the tissue pocket. The hardened material bioerodes in the pocket and releases the drug over a period of several days.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: April 15, 1997
    Assignee: ALZA Corporation
    Inventors: Randall G. Berggren, David J. Enscore, Susan M. Marks, James L. Osborne, Patrick S.-L. Wong, Wouter E. Roorda
  • Patent number: 5614578
    Abstract: A dosage form is disclosed comprising an injection-molded housing member free of organic solvents.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: March 25, 1997
    Assignee: Alza Corporation
    Inventors: Liang C. Dong, Patrick S. L. Wong, Crystal Pollock, Vincent J. Ferrari
  • Patent number: 5603954
    Abstract: A dosage form is disclosed for delivering pentoxifylline to a patient in need of pentoxifylline therapy. A method is discussed for delivery pentoxifylline to a patient at a dosage form controlled rate over an extended period of time.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: February 18, 1997
    Assignee: ALZA Corporation
    Inventors: Patrick S. L. Wong, George V. Guittard, Atul D. Ayer
  • Patent number: 5591454
    Abstract: The invention disclosed comprises a method for administering the antidiabetic drug glipizide to a patient in need of glipizide in need of antidiabetic therapy.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: January 7, 1997
    Assignee: ALZA Corporation
    Inventors: Anthony L. Kuczynski, Atul D. Ayer, Patrick S.-L. Wong
  • Patent number: 5534263
    Abstract: The present invention is directed to an active agent dosage form which 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 on its surface two or more insoluble bands. The invention is also directed to the method for making the active agent dosage form.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: July 9, 1996
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, David E. Edgren, Liang C. Dong, Vincent J. Ferrari
  • Patent number: 5532003
    Abstract: A dosage form is disclosed for delivering pentoxifylline to a patient in need of pentoxifylline therapy. A method is discussed for delivery pentoxifylline to a patient at a dosage form controlled rate over an extended period of time.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: July 2, 1996
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, George V. Guittard, Atul D. Ayer
  • Patent number: 5531736
    Abstract: The present invention is directed to a fluid-imbibing dispensing device for the initially delayed delivery of an active agent to a fluid environment of use and to a method of using the dispensing device. The dispenser comprises a housing having a first wall section and a second wall section in reversibly sliding telescopic arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; at least one active agent formulation in the compartment; and expansion means and a push plate in the compartment for separating apart the first and second wall sections of the housing after exposure to the environment of use to expose the active agent formulation to the environment of use.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: July 2, 1996
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
  • Patent number: 5512299
    Abstract: A method of treating inflammatory disease of the mouth by locally delivering beclomethasone dipropionate and related compounds to the oral cavity of a patient over an extended period of time is disclosed. In one embodiment, beclomethasone dipropionate is delivered by an osmotic device (10), in another embodiment, it is delivered by an erosion controlled device (110) and in yet another embodiment, it is delivered by a diffusion controlled device (310).
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: April 30, 1996
    Assignee: Alza Corporation
    Inventors: Virgil A. Place, Myriam T. Encarnacion, Patrick S. L. Wong, Juan M. E. Harrison
  • Patent number: 5499979
    Abstract: A dispenser for use in a fluid environment which is capable of delivery of plurality of drugs in any desired delivery pattern or profile.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: March 19, 1996
    Assignee: Alza Corporation
    Inventors: Patrick S.-L. Wong, Felix Theeuwes, James B. Eckenhoff
  • Patent number: 5498255
    Abstract: The present invention is directed to a fluid-imbibing dispensing device for the extended or protracted delivery of an active agent following an initially delayed startup of the delivery to a fluid environment of use.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: March 12, 1996
    Assignee: Alza Corporation
    Inventor: Patrick S.-L. Wong
  • Patent number: 5443459
    Abstract: The present invention is directed to a fluid-imbibing dispensing device for the initially delayed delivery of an active agent to a fluid environment of use and to a method of using the dispensing device. The dispenser comprises a housing having a first wall section and a second wall section in reversibly sliding telescopic arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; at least one active agent formulation in the compartment; and expansion means and a push plate in the compartment for separating apart the first and second wall sections of the housing after exposure to the environment of use to expose the active agent formulation to the environment of use.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: August 22, 1995
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
  • Patent number: 5424289
    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: July 30, 1993
    Date of Patent: June 13, 1995
    Assignee: Alza Corporation
    Inventors: Heechung Yang, Vu A. Nguyen, Liang C. Dong, Patrick S.-L. Wong
  • Patent number: 5417682
    Abstract: The present invention is directed to a fluid-imbibing dispensing device for the immediate or almost immediate and extended delivery of an active agent over a prolonged period of time together with the initially delayed pulse delivery of an active agent to a fluid environment of use.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: May 23, 1995
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
  • Patent number: 5413572
    Abstract: An osmotic system is disclosed for delivering a beneficial agent formulation to an environment of use. The osmotic system comprises (a) an outside semipermeable wall, (b) a middle osmotically active layer, (c) a capsule comprising a beneficial agent, and (d) a passageway for dispensing the beneficial agent from the osmotic system.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: May 9, 1995
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, Brian L. Barclay, Michael H. Dealey
  • Patent number: 5391381
    Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: February 21, 1995
    Assignee: ALZA Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
  • Patent number: 5358721
    Abstract: A dosage form is disclosed for administering an antiviral drug to a patient in need of antiviral therapy.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: October 25, 1994
    Assignee: Alza Corporation
    Inventors: George V. Guittard, Patrick S. L. Wong, Anthony L. Kuczynski, David J. Kidney
  • Patent number: 5348746
    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: September 20, 1994
    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: 5340590
    Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: August 23, 1994
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
  • Patent number: 5324280
    Abstract: An osmotic system is disclosed for delivering a beneficial agent formulation to an environment of use. The osmotic system comprises (a) an outside semipermeable wall, (b) a middle osmotically active layer, (c) a capsule comprising a beneficial agent, and (d) a passageway for dispensing the beneficial agent from the osmotic system.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: June 28, 1994
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, Brian L. Barclay, Michael H. Dealey