Patents by Inventor Chao-tuan Liu

Chao-tuan Liu 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: 9941440
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: April 10, 2018
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Messerian, Wayne Newhauser
  • Patent number: 9759672
    Abstract: One feature pertains to a microdosimeter cell array that includes a plurality of microdosimeter cells each having a semiconductor volume adapted to generate a current in response to incident radiation. The semiconductor volumes of each of the plurality of microdosimeter cells have at least one of a size, a shape, a semiconductor type, and/or a semiconductor doping type and concentration that is associated with one or more cells or cell components of a human eye. A processing circuit is also communicatively coupled to the microdosimeter cell array and generates a signal based on the currents generated by the semiconductor volumes of the plurality of microdosimeter cells. The signal generated by the processing circuit is indicative of an amount of radiation absorbed by the microdosimeter cell array.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: September 12, 2017
    Inventors: James Francis Ziegler, Razmig Hagop Messerian, Wayne Newhauser, Chao-tuan Liu
  • Publication number: 20150372182
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Application
    Filed: August 26, 2015
    Publication date: December 24, 2015
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Messerian, Wayne Newhauser
  • Publication number: 20140363842
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Application
    Filed: August 26, 2014
    Publication date: December 11, 2014
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Hagop Messerian, Wayne Newhauser
  • Patent number: 8858888
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: October 14, 2014
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Hagop Messerian, Wayne Newhauser
  • Publication number: 20140170690
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Application
    Filed: August 5, 2013
    Publication date: June 19, 2014
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Hagop Messerian, Wayne Newhauser