Patents by Inventor Ganggiang Li

Ganggiang Li 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).

  • Electrospray ion source for mass spectroscopy
    Patent number: 7204431
    Abstract: The invention provides an electrospray apparatus with an auxiliary electrode, and a method of using.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: April 17, 2007
    Assignee: Agilent Technologies, Inc.
    Inventors: Ganggiang Li, Paul C. Goodley, Hongfeng Yin
  • Electrospray ion source for mass spectroscopy
    Publication number: 20050092855
    Abstract: The invention provides an electrospray apparatus with an auxiliary electrode, and a method of using.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 5, 2005
    Inventors: Ganggiang Li, Paul Goodley, Hongfeng Yin
  • High throughput mass spectrometer with laser desorption ionization ion source
    Patent number: 6747274
    Abstract: A high-throughput laser desorption/ionization (LDI) mass spectrometer has been developed and is described herein. The mass spectrometer employs an ion source that has a plurality of lasers firing in tandem at one or more samples to increase the rate at which ion packets are generated by the ion source.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: June 8, 2004
    Assignee: Agilent Technologies, Inc.
    Inventor: Ganggiang Li
  • High throughput mass spectrometer with laser desorption lonization ion source
    Publication number: 20030025074
    Abstract: A high-throughput laser desorption/ionization (LDI) mass spectrometer has been developed and is described herein. The mass spectrometer employs an ion source that has a plurality of lasers firing in tandem at one or more samples to increase the rate at which ion packets are generated by the ion source.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 6, 2003
    Inventor: Ganggiang LI
  • Ion packet generation for mass spectrometer
    Patent number: 6455845
    Abstract: A method of providing an ion packet to an analyzer section of a mass spectrometer from an ion beam, a pulser which can execute such a method, and a mass spectrometer which includes such a pulser. In the method, a field pulse is applied to extract an ion packet from the beam at a sideways direction to the beam and provide it to a mass analyzer section of the mass spectrometer, which pulse simultaneously causes non-extracted ions of the beam to be deflected onto an electrode of opposite charge. The pulse ON time is significantly longer than conventionally used. For example, the pulse ON time may be longer than the pulse OFF time or at least twice as long as or several times longer than required to extract the ion packet and provide it to the mass analyzer section, so as to reduce stray ions entering the mass analyzer section.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: September 24, 2002
    Assignee: Agilent Technologies, Inc.
    Inventors: Ganggiang Li, Carl A. Myerholtz, George Yefchak