Patents by Inventor Douglas Worsnop

Douglas Worsnop 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).

  • Method and device for ionizing particles of a sample gas flow
    Patent number: 9916972
    Abstract: A device for ionizing sample particles of a sample gas flow comprises a first flow tube for providing the sample gas flow, and an introducing means for providing H2SO4 molecules to an interaction region. In addition the device comprises a generator for producing reagent primary ions from particles of candidate reagent gas flow essentially in a primary ion production region. The device is configured to introduce said reagent primary ions with H2SO4 molecules in said interaction region in order to arrange interaction between the reagent primary ions and the H2SO4 molecules, thereby producing HSO4? ions and again to produce HSO4? ion clusters comprising HSO4? ions and at least two H2SO4 molecules via interactions of HSO4? with other H2SO4 molecules in said interaction region.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 13, 2018
    Assignee: UNIVERSITY OF HELSINKI
    Inventors: Mikko Sipilä, Heikki Junninen, Douglas Worsnop
  • Method and Device for Ionizing Particles of a Sample Gas Flow
    Publication number: 20160126079
    Abstract: A device for ionizing sample particles of a sample gas flow comprises a first flow tube for providing the sample gas flow, and an introducing means for providing H2SO4 molecules to an interaction region. In addition the device comprises a generator for producing reagent primary ions from particles of candidate reagent gas flow essentially in a primary ion production region. The device is configured to introduce said reagent primary ions with H2SO4 molecules in said interaction region in order to arrange interaction between the reagent primary ions and the H2SO4 molecules, thereby producing HSO4? ions and again to produce HSO4? ion clusters comprising HSO4? ions and at least two H2SO4 molecules via interactions of HSO4? with other H2SO4 molecules in said interaction region.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 5, 2016
    Inventors: Mikko Sipilä, Heikki Junninen, Douglas Worsnop