Patents by Inventor Michael-Mircea Guna

Michael-Mircea Guna 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).

  • Multipole mass filter having improved mass resolution
    Patent number: 7880140
    Abstract: A multipole mass filter having improved mass resolution. The multipole mass filer having a first electrode set coupled to at least a RF voltage source and a second electrode set interposed and parallel to the first electrode set. The second electrode set having a variable AC voltage coupled to two radially opposing electrodes of the second electrode set.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: February 1, 2011
    Assignee: DH Technologies Development Pte. Ltd
    Inventors: Michael-Mircea Guna, James Hager
  • MULTIPOLE MASS FILTER HAVING IMPROVED MASS RESOLUTION
    Publication number: 20080272295
    Abstract: A multipole mass filter having improved mass resolution. The multipole mass filer having a first electrode set coupled to at least a RF voltage source and a second electrode set interposed and parallel to the first electrode set. The second electrode set having a variable AC voltage coupled to two radially opposing electrodes of the second electrode set.
    Type: Application
    Filed: May 2, 2007
    Publication date: November 6, 2008
    Inventors: Michael Mircea-Guna, James Hager