Patents by Inventor John Yan

John Yan 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).

  • Publication number: 20020133217
    Abstract: An intravascular balloon catheter comprises a tubular catheter body having a balloon structure removably mounted over the catheter body. The catheter body has a guidewire lumen, and the catheter body may be left in place within a patient's vasculature while the balloon structure is withdrawn and optionally a second balloon structure introduced over the catheter body. The catheter and methods of the present invention are particularly suitable for performing angioplasty and subsequent procedures, such as stent placement, which are best performed using successive interventional balloon structures.
    Type: Application
    Filed: February 20, 2002
    Publication date: September 19, 2002
    Applicant: Avantec Vascular Corporation
    Inventors: Motasim Sirhan, John Yan, Kevin Gertner
  • Publication number: 20020114823
    Abstract: The present invention provides improved devices and methods for minimizing and/or inhibiting restenosis and hyperplasia after intravascular intervention. In particular, the present invention provides luminal prostheses which allow for programmed and controlled mycophenolic acid delivery with increased efficacy to selected locations within a patient's vasculature to inhibit restenosis. An intraluminal delivery prosthesis may comprise an expansible structure and means on or within the structure for releasing mycophenolic acid at a rate selected to inhibit smooth muscle cell proliferation.
    Type: Application
    Filed: February 13, 2001
    Publication date: August 22, 2002
    Inventors: Motasim Sirhan, John Yan
  • Publication number: 20020082679
    Abstract: A device and a method using the same, for reducing restenosis and hyperplasia after intravascular intervention. In particular, the present invention provides luminal prostheses which allow for controlled release of at least one therapeutic capable agent with increased efficacy to selected locations within a patient's vasculature to reduce restenosis. An intraluminal prosthesis may comprise an expandable structure and a source adjacent the expandable structure for releasing the therapeutic capable agent into the body lumen to reduce smooth muscle cell proliferation.
    Type: Application
    Filed: November 1, 2001
    Publication date: June 27, 2002
    Applicant: AVANTEC VASCULAR CORPORATION
    Inventors: Motasim Sirhan, John Yan
  • Publication number: 20020082677
    Abstract: The present invention provides improved devices and methods for minimizing and/or inhibiting restenosis and hyperplasia after intravascular intervention. In particular, the present invention provides luminal prostheses which allow for programmed and controlled methylprednisolone delivery with increased efficacy to selected locations within a patient's vasculature to inhibit restenosis. An intraluminal delivery prosthesis may comprise an expansible structure and means on or within the structure for releasing methylprednisolone into the body lumen to inhibit smooth muscle cell proliferation.
    Type: Application
    Filed: February 13, 2001
    Publication date: June 27, 2002
    Inventors: Motasim Sirhan, John Yan
  • Publication number: 20020082685
    Abstract: The present invention provides improved devices and methods for inhibiting restenosis and hyperplasia after intravascular intervention. In particular, the present invention provides luminal prostheses which allow for programmed and controlled substance delivery with increased efficacy to selected locations within a patient's vasculature to inhibit restenosis. The luminal delivery prosthesis comprises a scaffold which is implantable within a body lumen and means on the scaffold for releasing a substance from the scaffold. The substance is released over a predetermined time pattern comprising an initial phase wherein the substance delivery rate is below a threshold level and a subsequent phase wherein the substance delivery rate is above a threshold level.
    Type: Application
    Filed: February 13, 2001
    Publication date: June 27, 2002
    Inventors: Motasim Sirhan, John Yan
  • Publication number: 20020082678
    Abstract: The present invention provides improved devices and methods for minimizing and/or inhibiting restenosis and hyperplasia after intravascular intervention. In particular, the present invention provides luminal prostheses which allow for programmed and controlled mizoribine delivery with increased efficacy to selected locations within a patient's vasculature to inhibit restenosis. An intraluminal delivery prosthesis may comprise an expansible structure and means on or within the structure for releasing mizoribine into the body lumen to inhibit smooth muscle cell proliferation.
    Type: Application
    Filed: February 13, 2001
    Publication date: June 27, 2002
    Inventors: Motasim Sirhan, John Yan
  • Publication number: 20020032457
    Abstract: An intravascular balloon catheter comprises a tubular catheter body having a balloon structure removably mounted over the catheter body. The catheter body has a guidewire lumen, and the catheter body may be left in place within a patient's vasculature while the balloon structure is withdrawn and optionally a second balloon structure introduced over the catheter body. The catheter and methods of the present invention are particularly suitable for performing angioplasty and subsequent procedures, such as stent placement, which are best performed using successive interventional balloon structures.
    Type: Application
    Filed: May 31, 2001
    Publication date: March 14, 2002
    Inventors: Motasim Sirhan, John Yan, Kevin Gertner
  • Patent number: 6003386
    Abstract: A single, disposable differential transducer having a molded plastic body in which there is a pair of chambers separated by a strain gage electronic chip that flexes in accordance with the difference in the pressures between the two chambers. The plastic housing has inlets to allow communication with the chambers and the overall unit is readily manufactured of inexpensive components that allow disposability of the unit when it has been used on a patient. The pressure transducer chambers are isolasted from each other such that differing locations of the patient may be sensed for pressure at the same time without the risk of inadvertant cross-contamination.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: December 21, 1999
    Assignee: Becton, Dickinson and Company
    Inventors: Robert Guthrie, John Yan, Rene Luigies
  • Patent number: 5889212
    Abstract: A single, disposable differential transducer having a molded plastic body in which there is a pair of chambers separated by a strain gage electronic chip that flexes in accordance with the difference in the pressures between the two chambers. The plastic housing has inlets to allow communication with the chambers and the overall unit is readily manufactured of inexpensive components that allow disposability of the unit when it has been used on a patient. The pressure transducer chambers are isolated from each other such that differing locations of the patient may be sensed for pressure at the same time without the risk of inadvertant cross-contamination.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: March 30, 1999
    Assignee: Becton Dickinson and Company
    Inventors: Robert Guthrie, John Yan, Rene Luigies