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).

  • 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: 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: 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: 5266332
    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 30, 1993
    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: 5254349
    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: October 19, 1993
    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: 5200195
    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: December 6, 1991
    Date of Patent: April 6, 1993
    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: 5034428
    Abstract: A method of biomolecule immobilization is described in which the biomolecule itself or, alternatively, a monomer-conjugated biomolecule, is grafted with free monomer onto a hydrophilic, solid-phase, polymeric substrate which has been pre-irradiated with ionizing radiation. The pre-irradiation step is carried out, preferably at -78.degree. C. in air, while the grafting step is carried out at 0.degree. C. in a substantially oxygen-free atmosphere. The technique is applicable to immobilization of a wide variety of biomolecules, such as enzymes, catalysts, hormones, lectins, drugs, vitamins, antibodies, antigens, nucleic acids, DNA and RNA segments, pesticides, dyes and fertilizers. The products may be used for therapeutic or diagnostic applications or bioseparations.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: July 23, 1991
    Assignee: Board of Regents of the University of Washington
    Inventors: Allan S. Hoffman, Liang C. Dong
  • Patent number: 4829098
    Abstract: A method of biomolecule immobilization is described in which the biomolecule itself or, alternatively, a monomer-conjugated biomolecule, is grafted with free monomer onto a hydrophilic, solid-phase, polymeric substrate which has been pre-irradiated with ionizing radiation. The pre-irradiation step is carried out, preferably at -78.degree. C. in air, while the grafting step is carried out at 0.degree. C. in a substantially oxygen-free atmosphere. The technique is applicable to immobilization of a wide variety of biomolecules, such as enzymes, catalysts, hormones, lectins, drugs, vitamins, antibodies, antigens, nucleic acids, DNA and RNA segments, pesticides, dyes and fertilizers. The products may be used for therapeutic or diagnostic applications or bioseparations.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: May 9, 1989
    Assignee: Washington Research Foundation
    Inventors: Allan S. Hoffman, Liang C. Dong