Patents by Inventor Liang C. Dong

Liang C. Dong 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).

  • Publication number: 20020071863
    Abstract: A pharmaceutical composition comprising a liquid antiviral formulation is disclosed. Additionally, a dosage form and a method for administering an antiviral pharmaceutical composition are disclosed.
    Type: Application
    Filed: December 8, 2000
    Publication date: June 13, 2002
    Inventors: Liang C. Dong, Steven D. Espinal, Patrick S.-L. Wong, Paul R. Magruder
  • Patent number: 6342249
    Abstract: Controlled release of liquid, active agent formulations is provided by dispersing porous particles containing the liquid active agent formulation in osmotic, push-layer dosage forms. The dosage forms may provide for continuous or pulsatile delivery of active agents.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: January 29, 2002
    Assignee: Alza Corporation
    Inventors: Patrick S. -L. Wong, David E. Edgren, Liang C. Dong, Crystal Pollock-Dove
  • Patent number: 6316028
    Abstract: The present invention is directed to an active agent dosage that is useful for the prolonged delivery of an active agent formulation to 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: August 31, 2000
    Date of Patent: November 13, 2001
    Inventors: Patrick S.-L. Wong, David Emil Edgren, Liang C. Dong, Vincent Joseph Ferrari
  • Publication number: 20010036472
    Abstract: A dosage form comprising a gelatin capsule formed with a composite wall and containing a liquid, active agent formulation where the wall comprises a barrier layer formed over the external surface of the gelatin capsule, an expandable layer formed over the barrier layer and a semipermeable layer formed over the expandable layer is described. The dosage forms and methods provide for the conversion of standard gelatin, liquid formulation capsules into controlled, release dosage forms that permit the controlled release of the active agent into the environment of use over time.
    Type: Application
    Filed: May 25, 2001
    Publication date: November 1, 2001
    Inventors: Patrick S.-L. Wong, Liang C. Dong, Jiansheng Wan
  • Patent number: 6183466
    Abstract: A dosage form is disclosed comprising a wall that defines an injection-molded compartment housing a capsule comprising a drug formulation.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: February 6, 2001
    Assignee: Alza Corporation
    Inventors: Patrick S. L. Wong, Felix Theeuwes, Vincent J. Ferrari, Liang C. Dong
  • 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: 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: 5830502
    Abstract: A dosage form is disclosed comprising an injection-molded housing member free of organic solvents.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: November 3, 1998
    Assignee: ALZA Corporation
    Inventors: Liang C. Dong, Patrick S. L. Wong, Crystal Pollock, Vincent J. Ferrari
  • Patent number: 5830501
    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: November 3, 1998
    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: 5817335
    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 being of a predetermined length of time. The dispensing device is formed of a first and second housing that are in reversibly sliding telescoping arrangement with each other. The first housing contains the active agent formulation and has an aspect ratio less than 1. The housings are preferably. ovoloid in shape.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: October 6, 1998
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, Liang C. Dong, Vincent J. Ferrari, Jeri D. Wright, Steven D. Larsen
  • 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
  • Patent number: 5770227
    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: July 17, 1996
    Date of Patent: June 23, 1998
    Assignee: Alza Corporation
    Inventors: Liang C. Dong, Patrick S. L. Wong, Steven Espinal
  • Patent number: 5713852
    Abstract: A method is described for delivering a beneficial agent, such as an antiinflammatory agent, to the site of a painful condition in the oral cavity of a human being that utilizes an oral dosage form having an immediately releasable topical anesthetic and a sustained release beneficial agent. The topical anesthetic is released substantially independently of the beneficial agent to provide immediate pain relief and the application of the beneficial agent is continued over a long period of time.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 3, 1998
    Assignee: Alza Corporation
    Inventors: Joyce C. Anthony, Liang C. Dong, Susan M. Marks, Danusia Szumowski
  • Patent number: 5667804
    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: June 27, 1996
    Date of Patent: September 16, 1997
    Assignee: ALZA Corporation
    Inventors: Patrick S.-L. Wong, David Emil Edgren, Liang C. Dong, Vincent Joseph Ferrari
  • Patent number: 5633011
    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: August 4, 1994
    Date of Patent: May 27, 1997
    Assignee: ALZA Corporation
    Inventors: Liang C. Dong, Patrick S.-L. Wong, Steven Espinal
  • 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: 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: 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