The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2012
Filed:
Apr. 02, 2009
Terhi Mattila, Kuopio, FI;
Osmo Anttalainen, Mikkeli, FI;
Esko Karpanoja, Mikkeli, FI;
Heikki Paakkanen, Kuopio, FI;
Tero Katto, Mikkeli, FI;
Erkka Saukko, Tampere, FI;
Terhi Mattila, Kuopio, FI;
Osmo Anttalainen, Mikkeli, FI;
Esko Karpanoja, Mikkeli, FI;
Heikki Paakkanen, Kuopio, FI;
Tero Katto, Mikkeli, FI;
Erkka Saukko, Tampere, FI;
Environics Oy, Mikkeli, FI;
Abstract
The invention relates to a method and device for measuring gaseous substances, in which the method comprises the stages: ionization of the sample gas in a gas flow, leading of the ionized gas flow through an elongated ion-mobility measuring chamber in the cross-section defined by it, filtering out of ions from the ionized gas flow at a distance from the measuring electrodes, permitting the passage of only the ions travelling from the flow cross-section at the selected point, separation of ions with a different ion mobility, with the aid of a transverse static electric field and at least one measuring-electrode pair arranged along the wall of the measuring chamber.