Patents by Inventor Anssi ARFFMAN

Anssi ARFFMAN 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 apparatus for monitoring number density of aerosol particles
    Patent number: 12146809
    Abstract: An apparatus for measuring aerosol particles includes a charging unit to form charged particles by charging particles of an aerosol sample flow by diffusion charging, and a collecting unit to provide an electric current by collecting charges from the charged particles by diffusion of the charged particles, the electric current being indicative of number density of aerosol particles of the aerosol sample flow. The internal pressure of the collecting unit is maintained at a reduced value in order to provide a flat response of the electric current for detecting nanoparticles of different sizes.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: November 19, 2024
    Assignee: Dekati Oy
    Inventors: Anssi Arffman, Ari Ukkonen, Markus Nikka, Esa Luntta, Erkki Lamminen
  • METHOD AND APPARATUS FOR MONITORING NUMBER DENSITY OF AEROSOL PARTICLES
    Publication number: 20230060801
    Abstract: An apparatus for measuring aerosol particles includes a charging unit to form charged particles by charging particles of an aerosol sample flow by diffusion charging, and a collecting unit to provide an electric current by collecting charges from the charged particles by diffusion of the charged particles, the electric current being indicative of number density of aerosol particles of the aerosol sample flow. The internal pressure of the collecting unit is maintained at a reduced value in order to provide a flat response of the electric current for detecting nanoparticles of different sizes.
    Type: Application
    Filed: February 2, 2021
    Publication date: March 2, 2023
    Applicant: Dekati Oy
    Inventors: Anssi ARFFMAN, Ari UKKONEN, Markus NIKKA, Esa LUNTTA, Erkki LAMMINEN