Patents by Inventor Keith E. Magoon

Keith E. Magoon 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).

  • Positive pressure drug releasing device
    Patent number: 4312347
    Abstract: A positive pressure long-term drug delivery device particularly useful for the intravaginal or intrauterine release of a drug capable of passing through a diffusion membrane and being absorbed by the vaginal or uterine epithelium. The device includes a tubular casing having a plunger urged by a compression spring to create a continuous positive pressure on a drug in liquid form within the chamber of the casing, a supported membrane at one end of the casing through which such drug diffuses at a predetermined rate, and resilient elements at the opposite end of the casing for facilitating retention of the device throughout the term of administration of the drug.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: January 26, 1982
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Keith E. Magoon, Lawrence E. Evans, Frederick B. Hembrough