Patents by Inventor Barbara Ells

Barbara Ells 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).

  • FAIMS apparatus and method using carrier gases that contain a trace amount of a dopant species
    Patent number: 7026612
    Abstract: Disclosed is a method and apparatus for improving at least one of a peak separation and a signal intensity relating to an ion of interest being transmitted through an analyzer region of a FAIMS apparatus. A method according to the instant invention includes a step of introducing ions including an ion of interest into an analyzer region of a FAIMS. A flow of a doped carrier gas other than air is also provided through the analyzer region. The doped carrier gas includes a carrier gas and a trace amount of a predetermined dopant gas, the predetermined dopant gas selected for improving at least one of a peak separation and a signal intensity relating to the ion of interest relative to the peak separation and the signal intensity relating to the ion of interest in the presence of the carrier gas only. The ion of interest is selectively transmitted through the analyzer region in the presence of the doped carrier gas, and detected at a detector.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: April 11, 2006
    Assignee: Ionalytics Corporation
    Inventors: Roger Guevremont, Randy Purves, David Barnett, Barbara Ells
  • Faims apparatus and method using carrier gases that contain a trace amount of a dopant species
    Publication number: 20050161596
    Abstract: Disclosed is a method and apparatus for improving at least one of a peak separation and a signal intensity relating to an ion of interest being transmitted through an analyzer region of a FAIMS apparatus. A method according to the instant invention includes a step of introducing ions including an ion of interest into an analyzer region of a FAIMS. A flow of a doped carrier gas other than air is also provided through the analyzer region. The doped carrier gas includes a carrier gas and a trace amount of a predetermined dopant gas, the predetermined dopant gas selected for improving at least one of a peak separation and a signal intensity relating to the ion of interest relative to the peak separation and the signal intensity relating to the ion of interest in the presence of the carrier gas only. The ion of interest is selectively transmitted through the analyzer region in the presence of the doped carrier gas, and detected at a detector.
    Type: Application
    Filed: February 7, 2003
    Publication date: July 28, 2005
    Applicant: Ionalytics Corporation
    Inventors: Roger Guevremont, Randy Purves, David Barnett, Barbara Ells