Patents by Inventor Muny Chum

Muny Chum 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).

  • Delivery and balloon dilatation catheter and method of using
    Patent number: 5569184
    Abstract: A reinforced lumen catheter body is disclosed, such as for use in a balloon dilatation and/or drug delivery catheter. In one embodiment, the catheter body is provided with a guidewire access port along its length, to permit exchange of catheters during a cardiovascular procedure. Preferably, at least one lumen extending through the catheter body is defined within a tubular metal wall. One or more adjacent lumen are defined within a polymeric wall.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: October 29, 1996
    Assignee: Cardiovascular Dynamics, Inc.
    Inventors: Michael Crocker, Michael Henson, Muny Chum
  • Drug delivery and dilatation catheter having a reinforced perfusion lumen
    Patent number: 5421826
    Abstract: An improved drug delivery catheter, for use in the prevention of restenosis of a dilated vascular region, and/or for use in the delivery of a medication to a preselected vascular site. The catheter comprises an elongate body, an inflation balloon disposed about a catheter body. In a drug delivery embodiment, a perforated drug delivery balloon is disposed concentrically about the inflation balloon. In another embodiment, the two balloons are heat sealed together at the distal and proximal ends of the catheter body. A first lumen extends through the catheter body for communicating with the inflation balloon, and a second lumen extends through the body for communicating with the drug delivery balloon. Methods describing the intraluminal delivery of drugs to a site specific location are also disclosed, including the delivery of a drug to a vascular area before, during or after a conventional PTCA procedure.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: June 6, 1995
    Assignee: Cardiovascular Dynamics, Inc.
    Inventors: Michael D. Crocker, Michael R. Henson, Muny Chum
  • Drug delivery and dilatation catheter
    Patent number: 5295962
    Abstract: An improved drug delivery catheter, for use in the prevention of restenosis of a dilated vascular region, and/or for use in the delivery of a medication to a preselected vascular site. The catheter comprises an elongate body, an inflation balloon disposed about a catheter body. In a drug delivery embodiment, a perforated drug delivery balloon is disposed concentrically about the inflation balloon. In another embodiment, the two balloons are heat sealed together at the distal and proximal ends of the catheter body. A first lumen extends through the catheter body for communicating with the inflation balloon, and a second lumen extends through the body for communicating with the drug delivery balloon. Methods describing the intraluminal delivery of drugs to a site specific location are also disclosed, including the delivery of a drug to a vascular area before, during or after a conventional PTCA procedure.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: March 22, 1994
    Assignee: Cardiovascular Dynamics, Inc.
    Inventors: Michael D. Crocker, Michael R. Henson, Muny Chum