Patents by Inventor Yu-Ling Cheng

Yu-Ling Cheng 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: 5302397
    Abstract: Described herein is a drug delivery system useful to deliver drugs at low dosage levels to patients in a sustained fashion and at a controlled rate. The system comprises a wettable polymeric matrix in which is dispersed a multiplicity of particles containing a substantially homogeneous blend of osmotically active excipient and not more than about 10% by weight of drug. The system is particularly well suited for delivery of therapeutic macromolecules such as protein drugs. Delivery of epidermal growth factor is exemplified.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: April 12, 1994
    Inventors: Brian G. Amsden, Yu-Ling Cheng
  • Patent number: 4940586
    Abstract: A method for enhancing the transdermal flux of a transdermally deliverable drug through intact skin is described in which the drug is delivered simultaneously with sucrose monolaurate or a mixture of sucrose esters of coconut fatty acids, which is predominantly sucrose monolaurate. Preferred embodiments of therapeutic systems for delivering the drug and the sucrose ester employ a matrix containing drug at a concentration above saturation.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: July 10, 1990
    Assignee: Alza Corporation
    Inventors: Yu-Ling Cheng, Robert M. Gale, Edna Sugihara, Harold F. Sanders
  • Patent number: 4900555
    Abstract: A method for enhancing the transdermal flux of a transdermally deliverable drug through intact skin is described in which the drug is delivered simultaneously with sucrose monolaurate or a mixture of sucrose esters of coconut fatty acids, which is predominatly sucrose monolaurate. Preferred embodiments of therapeutic systems for delivering the drug and the sucrose ester employ a matrix containing drug at a concentration above saturation.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: February 13, 1990
    Assignee: Alza Corporation
    Inventors: Yu-Ling Cheng, Robert M. Gale, Edna Sugihara, Harold F. Sanders
  • Patent number: 4865848
    Abstract: A method for enhancing the transdermal flux of a transdermally deliverable drug through intact skin is described in which the drug is delivered simultaneously with sucrose monolaurate or a mixture of sucrose esters of coconut fatty acids, which is predominantly sucrose monolaurate. Preferred embodiments of therapeutic systems for delivering the drug and the sucrose ester employ a matrix containing drug at a concentration above saturation.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: September 12, 1989
    Assignee: ALZA Corporation
    Inventors: Yu-Ling Cheng, Robert M. Gale, Edna Sugihara, Harold F. Sanders
  • Patent number: 4820720
    Abstract: A dosage form that coadministers a drug and two percutaneous absorption enhancers to a defined area of the skin is described. The dosage form comprises a body that contains supplies of drug and enhancers and has a basal surface that contacts the area of skin and transmits the drug and enhancers to the area for absorption thereby.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: April 11, 1989
    Assignee: ALZA Corporation
    Inventors: Harold F. Sanders, Yu-Ling Cheng, David J. Enscore, Shari B. Libicki
  • Patent number: 4788062
    Abstract: A transdermal delivery system for the administering of progesterone and an estradiol ester alone or in combination utilizing a polymer matrix having the drug(s) along with a permeation enhancer dispersed throughout.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: November 29, 1988
    Assignee: ALZA Corporation
    Inventors: Robert M. Gale, David J. Enscore, Diane E. Nedberge, Melinda Nelson, Yu-Ling Cheng, Shari B. Libicki
  • Patent number: 4764379
    Abstract: A dosage form that coadministers a drug and two percutaneous adsorption enhancers to a defined area of the skin is described. The dosage form comprises a body that contains supplies of drug and enhancers and has a basal surface that contacts the area of skin and transmits the drug and enhancers to the area for absorption thereby.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: August 16, 1988
    Assignee: Alza Corporation
    Inventors: Harold F. Sanders, Yu-Ling Cheng, David J. Enscore, Shari B. Libicki
  • Patent number: 4746515
    Abstract: A method for enhancing the transdermal flux of a transdermally deliverable drug through intact skin is described in which the drug is delivered simultaneously with glycerol monolaurate. Preferred embodiments of therapeutic systems for delivering drug and glycerol monolaurate employ matrix containing drug at a concentration above saturation.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: May 24, 1988
    Assignee: ALZA Corporation
    Inventors: Yu-Ling Cheng, Diane E. Nedberge, Edna Sugihara
  • Patent number: 4153430
    Abstract: This invention introduces a process and apparatuses for bringing a gas phase into contact with a liquid phase for an extended period of time and subjecting the phases to appropriate motions so as to accomplish efficient absorption and desorption operations and efficient pressurization and depressurization operations. The process is conducted in a processing system that comprises of many small compartments and a moving mechanism to which the compartments are attached. Each compartment has a confining wall to contain a mass of the feed gas and has an opening through which a liquid may be brought in contact with the gas to provide a gas-liquid interface. The processing system is submerged in the liquid phase and is divided into a first zone and a second zone; the compartments in the two zones are respectively subjected to a downward movement and an upward movement.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: May 8, 1979
    Inventors: Chen-Yen Cheng, Yu-Ling Cheng, Wu-Cheng Cheng