Patents by Inventor Yehai Yan

Yehai 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).

  • Micro-structured and nano-structured surfaces on biodegradable polymers
    Patent number: 8906282
    Abstract: In embodiments of the present invention, a biodegradable/biodegradable polymer film may be used as a scaffold for tissue engineering scaffolds for engineering organized organs, such as vascular grafts, for example. In one embodiment, an ultraviolet (UV) resin made from a diacrylated biodegradable oligomer is molded into a flexible scaffold having cavities and/or channels. Channel/cavity size may be on the order of micrometers and/or nanometers, and thus the walls may have high aspect ratios. Smooth muscle cells may be deposited in the channels and because of the high aspect ratios, the cells may align along the channels/cavities as confluence is reached.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: December 9, 2014
    Assignee: Nanyang Technological University
    Inventors: Bee Eng Mary Chan, Jinye Shen, Bin He, Aiping Zhu, Yehai Yan, Chee Yoon Yue
  • Method of aligning nanotubes
    Patent number: 8216636
    Abstract: A method of aligning nanotubes is described, where a plurality of channels is provided on a substrate (100), a suspension of nanotubes is placed on or adjacent an open surface of the channels (102) and the suspension is allowed to flow into the channels to align the nanotubes substantially parallel to the longitudinal axis of the channels (104).
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: July 10, 2012
    Assignee: Nanyang Technological University
    Inventors: Bee Eng Mary Chan, Qing Zhang, Yehai Yan, Sai Li, Longqing Chen
  • METHOD OF ALIGNING NANOTUBES
    Publication number: 20090246408
    Abstract: A method of aligning nanotubes is described, where a plurality of channels is provided on a substrate (100), a suspension of nanotubes is placed on or adjacent an open surface of the channels (102) and the suspension is allowed to flow into the channels to align the nanotubes substantially parallel to the longitudinal axis of the channels (104).
    Type: Application
    Filed: July 27, 2007
    Publication date: October 1, 2009
    Applicant: Nanyang Technological University
    Inventors: Bee Eng Mary Chan, Qing Zhang, Yehai Yan, Sai Li, Longqing Chen
  • Micro-structured and nano-structured surfaces on biodegradable polymers
    Publication number: 20070009572
    Abstract: In embodiments of the present invention, a biodegradable/biodegradable polymer film may be used as a scaffold for tissue engineering scaffolds for engineering organized organs, such as vascular grafts, for example. In one embodiment, an ultraviolet (UV) resin made from a diacrylated biodegradable oligomer is molded into a flexible scaffold having cavities and/or channels. Channel/cavity size may be on the order of micrometers and/or nanometers, and thus the walls may have high aspect ratios. Smooth muscle cells may be deposited in the channels and because of the high aspect ratios, the cells may align along the channels/cavities as confluence is reached.
    Type: Application
    Filed: July 6, 2005
    Publication date: January 11, 2007
    Inventors: Bee Mary Chan, Jinye Shen, Bin He, Aiping Zhu, Yehai Yan, Chee Yue