Patents by Inventor Biwei MACDONALD

Biwei MACDONALD 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).

  • Patent number: 11871928
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: January 16, 2024
    Assignee: Transmural Systems LLC
    Inventors: Nasser Rafiee, Stuart MacDonald, Biwei MacDonald, Alana Rafiee
  • Publication number: 20220125430
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Application
    Filed: August 31, 2021
    Publication date: April 28, 2022
    Inventors: Nasser Rafiee, Stuart MacDonald, Biwei MacDonald, Alana Rafiee
  • Patent number: 11179156
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: November 23, 2021
    Assignees: The United States of America, as Represented by the Secretary, Department of Health and Human Services, Transmural Systems LLC
    Inventors: Nasser Rafiee, Stuart MacDonald, Robert J. Lederman, Kanishka Ratnayaka, Biwei MacDonald, Alana Rafiee
  • Publication number: 20190321043
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Application
    Filed: April 30, 2019
    Publication date: October 24, 2019
    Inventors: Nasser Rafiee, Stuart MacDonald, Robert J. Lederman, Kanishka Ratnayaka, Biwei MacDonald, Alana Rafiee
  • Patent number: 10426482
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: October 1, 2019
    Assignees: The United States of America, as Represented by the Secretary, Department of Health and Human Services, Transmural Systems LLC
    Inventors: Nasser Rafiee, Stuart MacDonald, Robert J. Lederman, Kanishka Ratnayaka, Biwei MacDonald, Alana Rafiee
  • Publication number: 20170071722
    Abstract: In some implementations, a radially self-expanding endograft prosthesis is provided that includes (i) distal flange that is self-expanding and configured to flip generally perpendicularly with respect to a body of the prosthesis to help seat the prosthesis against a tissue wall, (ii) a distal segment extending proximally from the distal flange that has sufficient stiffness to maintain a puncture open that is formed through a vessel wall (iii) a compliant middle segment extending proximally from the distal segment, the middle segment being more compliant than the distal segment, and having independently movable undulating strut rings attached to a tubular fabric, the combined structure providing flexibility and compliance to allow for full patency while flexed, the segment being configured to accommodate up to a 90 degree bend, (iv) a proximal segment having a plurality of adjacent undulating strut rings that are connected to each other.
    Type: Application
    Filed: September 15, 2016
    Publication date: March 16, 2017
    Inventors: Nasser RAFIEE, Stuart MACDONALD, Robert J. LEDERMAN, Kanishka RATNAYAKA, Biwei MACDONALD, Alana RAFIEE