Patents by Inventor Michael David Leslie Stonefield

Michael David Leslie 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).

  • Use of low-dose PDT to inhibit restenosis
    Patent number: 7122568
    Abstract: The present invention relates to the use of low-dose photodynamic therapy (PDT) to prevent, treat, inhibit or reduce restenosis in blood vessels. The present invention may be used in combination with any angioplastic procedure to prevent restenosis or to decrease the intima thickness, and thus luminal narrowing.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: October 17, 2006
    Assignee: QLT, Inc.
    Inventors: Beth Anne Allison, Philippe Maria Clotaire Margaron, Valery Rubinchik, Russell G. Hodge, Michael David Leslie Stonefield
  • Balloon catheter for photodynamic therapy
    Patent number: 6086558
    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 comprise 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: December 29, 1998
    Date of Patent: July 11, 2000
    Assignee: QLT PhotoTherapeutics, Inc.
    Inventors: Robert David Bower, Michael David Leslie Stonefield, Joseph Yan