Patents by Inventor Lawrence G. Hamel

Lawrence G. Hamel 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).

  • Lamina comprising carboxyvinyl polymer
    Patent number: 5023076
    Abstract: A dosage form is disclosed for delivering the beneficial drugs pseudoephedrine and brompheniramine to a biological environment of use.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: June 11, 1991
    Assignee: Alza Corporation
    Inventors: Atul D. Ayer, Lawrence G. Hamel
  • Delivery dispenser for treating cardiac arrhythmias
    Patent number: 5019396
    Abstract: A dosage form is disclosed comprising a first composition comprising two different polyethylene oxide osmopolymers for delivering a drug at a controlled rate over time.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: May 28, 1991
    Assignee: ALZA Corporation
    Inventors: Atul D. Ayer, Anthony L. Kuczynski, Patrick S. L. Wong, Lawrence G. Hamel, Maureen L. Jordan
  • Composition comprising drug, HPC, HPMC and PEO
    Patent number: 4915952
    Abstract: A dosage form is disclosed for delivering the beneficial drugs pseudoephedrine and brompheniramine to a biological environment of use.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: April 10, 1990
    Assignee: Alza Corporation
    Inventors: Atul D. Ayer, Lawrence G. Hamel
  • Chlorpheniramine therapy
    Patent number: 4857330
    Abstract: An osmotic dosage form is disclosed for delivering chlorpheniramine.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: August 15, 1989
    Assignee: Alza Corporation
    Inventors: Sally I. Stephens, Lawrence G. Hamel, Glen E. Barclay, Patrick S. L. Wong
  • Pseudoephedrine brompheniramine therapy
    Patent number: 4810502
    Abstract: A dosage form is disclosed for delivering the beneficial drugs pseudoephedrine and brompheniramine to a biological environment of use.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: March 7, 1989
    Assignee: ALZA Corporation
    Inventors: Atul D. Ayer, Lawrence G. Hamel