Patents by Inventor Martin Fierz

Martin Fierz 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 the measurement of the number concentration and of the average diameter of aerosol particles
    Patent number: 7549318
    Abstract: According to the invention, particles of an aerosol are firstly charged in a unipolar manner in a diffusion charger (10). They are subsequently led through a diffusional precipitator (20) in which a part of the particles is precipitated. The diffusional precipitator current is measured and a value for the number concentration is evaluated from the current. A single diffusional precipitator may be used for this. According to preferred embodiment, a means for measuring the influence current and/or an aerosol electrometer are additionally present, by way of which one may measure a complete current. The latter additionally permits the evaluation of the average particle size. Additionally, one may determine an elementary carbon total quantity from the average particle size with the help of a measurement of the photoelectric charging carried out in parallel.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: June 23, 2009
    Assignee: Matter Engineering
    Inventors: Heinz Burtscher, Martin Fierz
  • Method and device for the measurement of the number concentration and of the average diameter of aerosol particles
    Publication number: 20060150754
    Abstract: According to the invention, particles of an aerosol are firstly charged in a unipolar manner in a diffusion charger (10). They are subsequently led through a diffusional precipitator (20) in which a part of the particles is precipitated. The diffusional precipitator current is measured and a value for the number concentration is evaluated from the current. A single diffusional precipitator may be used for this. According to preferred embodiment, a means for measuring the influence current and/or an aerosol electrometer are additionally present, by way of which one may measure a complete current. The latter additionally permits the evaluation of the average particle size. Additionally, one may determine an elementary carbon total quantity from the average particle size with the help of a measurement of the photoelectric charging carried out in parallel.
    Type: Application
    Filed: January 12, 2006
    Publication date: July 13, 2006
    Applicant: MATTER ENGINEERING AG
    Inventors: Heinz Burtscher, Martin Fierz