Patents by Inventor Chu Pak

Chu Pak 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: 8461198
    Abstract: This invention provides a method for treating or preventing human atrial arrhythmia (fibrillation) using the leading flavone compound acacetin, and its derivatives and analogues that inhibit the ultra-rapidly-activating delayed rectifier potassium current (IKur or IKsus), transient outward potassium (Ito), and acetylcholine-activated potassium current (IK.Ach).
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: June 11, 2013
    Assignees: Versitech Limited, Shanghai Institute of Materia Medica, Chinese Academy of Sciences
    Inventors: Gui-Rong Li, Chu-Pak Lau, Guo-Wei Qin, Hong-Bing Wang
  • Publication number: 20110008888
    Abstract: Self-renewable embryonic stem cells (ESCs), derived from the inner cell mass of blastocysts, can propagate indefinitely in culture while maintaining their normal karyotypes and pluripotency to differentiate into all cell types. Therefore, ESCs may provide an unlimited supply of even specialized cells such as brain and heart cells for transplantation and cell-based therapies that are otherwise limited by donor availability. However, this promising application is hampered by concerns that ESCs or their multipotent derivatives also possess the potential to form malignant tumors after transplantation in vivo. The present invention provides for a novel genetic method to arrest undesirable cell division (of ESCs and other unwanted lineages) as a means to inhibit or eliminate their tumorgenic potential after transplantation.
    Type: Application
    Filed: February 23, 2006
    Publication date: January 13, 2011
    Applicant: The John Hopkins University
    Inventors: Ronald A. Li, Tian Xue, Chu-Pak Lau, Hung-Fat Tse
  • Publication number: 20100331271
    Abstract: This invention provides a method for treating or preventing human atrial arrhythmia (fibrillation) using the leading flavone compound acacetin, and its derivatives and analogues that inhibit the ultra-rapidly-activating delayed rectifier potassium current (IKur or IKsus), transient outward potassium (Ito), and acetylcholine-activated potassium current (IK.ACh).
    Type: Application
    Filed: September 7, 2010
    Publication date: December 30, 2010
    Inventors: Gui-Rong LI, Chu-Pak Lau, Guo-Wei Qin, Hong-Bing Wang
  • Patent number: 7816400
    Abstract: This invention provides a method for treating or preventing human atrial arrhythmia (fibrillation) using the leading flavone compound acacetin, and its derivatives and analogues that inhibit the ultra-rapidly-activating delayed rectifier potassium current (IKur or IKsus), transient outward potassium (Ito), and acetylcholine-activated potassium current (IK.ACh).
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 19, 2010
    Assignees: The University of Hong Kong, Shanghai Institute of Materia Medica, Chinese Academy of Sciences
    Inventors: Gui-Rong Li, Chu-Pak Lau, Guo-Wei Qin, Hong-Bing Wang
  • Publication number: 20080214493
    Abstract: This invention provides a method for treating or preventing human atrial arrhythmia (fibrillation) using the leading flavone compound acacetin, and its derivatives and analogues that inhibit the ultra-rapidly-activating delayed rectifier potassium current (IKur or IKsus), transient outward potassium (Ito), and acetylcholine-activated potassium current (IK.ACh).
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Inventors: Gui-Rong Li, Chu-Pak Lau, Guo-Wei Qin, Hong-Bing Wang
  • Publication number: 20030216654
    Abstract: A method for accurate and rapid automated detection of atrial fibrillation (AF), sinus rhythm (SF), and atrial flutter (AFL) is disclosed, which allows distinguishing of these cardiac signals with lowered risk of errors by implanted pacemakers and like devices. The method includes training episodes of intra-cardiac signals (called the closed data set CDS) to evaluate five feature parameters with a discriminator classifying the signal into AF, AFL or sinus rhythm (SR). Comparison with the independent decisions of experienced physicians for each episode reveals specificity, accuracy and sensitivity of greater than 97%. Each episode is a window of intracardiac signal of interval 1-2 seconds with the discriminator providing results in less than 0.25 s. In another aspect, the method is resistant to the presence of noise in the data. In yet another aspect, more feature parameters may be used in alternative implementations including for detecting signals other than AF, AFL & SR.
    Type: Application
    Filed: May 7, 2002
    Publication date: November 20, 2003
    Inventors: Weichao Xu, Hung-Fat Tse, Francis Hy Chan, Peter Chin Wan Fung, Chu-pak Lau
  • Patent number: 5543012
    Abstract: An improved, low-cost stretchable band incorporating a conductor for disposition around the human torso or other three-dimensional object, and particularly intended for use with respiration monitoring apparatus, is disclosed. Also presented is an improved enclosure housing circuitry releasable connected to the conductor in the band when the band is incorporated in respiration monitoring apparatus.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: August 6, 1996
    Assignee: Non-Invasive Monitoring Systems, Inc.
    Inventors: Herman L. Watson, Chu Pak
  • Patent number: 5331968
    Abstract: The present invention is an apparatus and method for improving the detection of the inductance "signal" generated by an inductive plethysmograph (12). Signal detection is improved by modifying the design of the inductive plethysmograph (12) and also by improving the design of the associated circuitry. By virtue of these improvements, the associated circuitry may be located remotely rather than on the transducer, as is the current practice. In one aspect of the invention, the impedance matching transformer (14) joining the inductive plethysmograph (12) to the oscillator (16) is selected such that the inductance of its primary winding is greater than about ten times the reflected inductance of the inductive plethysmograph (12) and the cable (24) joining it to the transformer (14). In accordance with another aspect of the invention, the inductive plethysmograph (12) is modified such that the conductor (20) incorporated therein encircles the relevant body portion a plurality of times.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: July 26, 1994
    Inventors: Gerald Williams, Herman Watson, Marvin A. Sackner, Chu Pak, James W. Chong
  • Patent number: 5301678
    Abstract: An improved, low-cost stretchable band incorporating a conductor for disposition around the human torso or other three-dimensional object, and particularly intended for use with respiration monitoring apparatus, is disclosed.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: April 12, 1994
    Assignee: Non-Invasive Monitoring System, Inc.
    Inventors: Herman L. Watson, Chu Pak, Jose A. Adams, William Meichner
  • Patent number: 4807640
    Abstract: An improved, low-cost stretchable band incorporating a conductor for disposition about the human torso or other three dimensional object, and particularly intended for use with respiration monitoring apparatus, is disclosed. A method for making the band, which method is suitable to mass production techniques, is also disclosed. Also presented is an improved enclosure housing circuitry releasably connected to the conductor in the band when the band is incorporated in respiration monitoring apparatus.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: February 28, 1989
    Assignee: Respitrace Corporation
    Inventors: Herman L. Watson, Deborah R. Sackner, Chu Pak, Marvin A. Sackner