Patents by Inventor Chenguang Liu

Chenguang 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).

  • INTRACARDIAC ELECTROGRAM TIME FREQUENCY NOISE DETECTION
    Publication number: 20110224988
    Abstract: Systems, methods, and apparatus for identifying and classifying noise of an intracardiac electrogram of a cardiac rhythm management device to prevent inaccurate detection of a cardiac episode are disclosed. In an example, three channels are analyzed to identify and determine whether an episode or noise has been detected.
    Type: Application
    Filed: March 3, 2011
    Publication date: September 15, 2011
    Inventors: Deepa Mahajan, Chenguang Liu, Yanting Dong
  • Methods and apparatus of three dimensional cardiac electrophysiological imaging
    Patent number: 7841986
    Abstract: Generating a three-dimensional representation of cardiac electrical activity within a subject's heart includes collecting, from a catheter having a distal portion that includes sensors that sense electrical activity and which catheter distal portion is positioned within a cardiac chamber of a subject, data for electrical activity sensed by the catheter distal portion while positioned within the chamber of the heart. The method also includes executing an imaging algorithm on the collected electrical activity data to generate a three-dimensional representation of cardiac electrical activity within a volume of the subject including all or a portion of the subject's heart. The method further includes displaying the imaged three-dimensional cardiac electrical activity.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: November 30, 2010
    Assignee: Regents of the University of Minnesota
    Inventors: Bin He, Zhongming Liu, Chenguang Liu
  • METHODS AND APPARATUS OF THREE DIMENSIONAL CARDIAC ELECTROPHYSIOLOGICAL IMAGING
    Publication number: 20070270703
    Abstract: Generating a three-dimensional representation of cardiac electrical activity within a subject's heart includes collecting, from a catheter having a distal portion that includes sensors that sense electrical activity and which catheter distal portion is positioned within a cardiac chamber of a subject, data for electrical activity sensed by the catheter distal portion while positioned within the chamber of the heart. The method also includes executing an imaging algorithm on the collected electrical activity data to generate a three-dimensional representation of cardiac electrical activity within a volume of the subject including all or a portion of the subject's heart. The method further includes displaying the imaged three-dimensional cardiac electrical activity.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 22, 2007
    Applicant: Regents of the University of Minnesota
    Inventors: Bin He, Zhongming Liu, Chenguang Liu
  • Heavy oil hydrocracking process with multimetallic liquid catalyst in slurry bed
    Patent number: 6660157
    Abstract: The invention relates to a new and improved heavy oil hydrocracking process using a multimetallic liquid catalyst in a slurry-bed reactor, particularly an improvement of lightweight treatment of heavy oil in the petroleum processing technology. According to the present invention, a slurry-bed hydrocracking reactor and a highly dispersed multimetallic liquid catalyst are mainly applied during the process. A fixed-bed hydrotreating reactor is also used on line to enhance lightweight oil yield from heavy oil under normal pressure.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: December 9, 2003
    Assignees: PetroChina Company Limited, University of Petroleum
    Inventors: Guohe Que, Cungui Men, Chunxu Meng, An Ma, Jiashun Zhou, Wenan Deng, Zongxian Wang, Baoquan Mu, Chenguang Liu, Dong Liu, Shichang Liang, Bin Shi
  • Heavy oil hydrocracking process with multimetallic liquid catalyst in slurry bed
    Publication number: 20020125172
    Abstract: The invention relates to a new and improved heavy oil hydrocracking process using a multimetallic liquid catalyst in a slurry-bed reactor, particularly an improvement of lightweight treatment of heavy oil in the petroleum processing technology. According to the present invention, a slurry-bed hydrocracking reactor and a highly dispersed multimetallic liquid catalyst are mainly applied during the process. A fixed-bed hydrotreating reactor is also used on line to enhance lightweight oil yield from heavy oil under normal pressure.
    Type: Application
    Filed: November 2, 2001
    Publication date: September 12, 2002
    Applicant: PetroChina Company Limited/University of Petroleum (East China)
    Inventors: Guohe Que, Cungui Men, Chunxu Meng, An Ma, Jiashun Zhou, Wenan Deng, Zongxian Wang, Baoquan Mu, Chenguang Liu, Dong Liu, Shichang Liang, Bin Shi