Patents by Inventor Mike Stonefield

Mike Stonefield 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).

  • Therapeutic methods and devices for irradiating columnar environments
    Patent number: 6146409
    Abstract: The present invention provides improved methods and devices for delivering light to the surface of a biological column, for example in the treatment of Barrett's esophagus using PDT. The improvement comprises the use of an extended irradiation segment or window. The improved methods of the present invention permits treatment lengths of the biological column to be increased without increasing the incidence of stricture formation.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: November 14, 2000
    Assignees: Bergein F. Overholt, Thompson Cancer Survival Center, QLT PhotoTherapeuticcs Inc.
    Inventors: Bergein F. Overholt, Masoud Panjehpour, Mike Stonefield
  • Balloon catheter for photodynamic therapy
    Patent number: 6013053
    Abstract: The present invention provides improved balloon catheter apparatuses for use in therapies requiring delivery of uniform light to a treatment area. The improved apparatus comprises a balloon having a defined treatment window where the window is delineated using a reflective material. The apparatus may further include a fiber optic cable that terminates in a diffusion tip where the diffusion tip is longer than the treatment window. The present invention further provides improved therapeutic methods that use the improved balloon catheters of the present invention.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: January 11, 2000
    Assignee: QLT Photo Therapeutics Inc.
    Inventors: Bob Bower, Mike Stonefield, Joseph Yan