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:
Sep. 06, 2016
Filed:
Nov. 21, 2012
Dh Technologies Development Pte. Ltd., Singapore, SG;
Bruce A. Thomson, Toronto, CA;
Mircea Guna, North York, CA;
DH Technologies Development Pte. Ltd., Singapore, SG;
Abstract
A system of mass spectrometry is disclosed having an ion source for generating ions at substantially atmospheric pressure. The system has a sampling member with an orifice disposed therein. The sampling member forms a vacuum chamber with a mass spectrometer. The system also has a curtain plate between the ion source and the sampling member. The curtain plate has an aperture therein, having a cross-section and being spaced from the sampling member to define a flow passage between the curtain plate and the sampling member, and to define an annular gap between the orifice and the aperture. The area of the annular gap is less than the cross-sectional area of the aperture. The system also has a power supply for applying a voltage to the curtain plate, and a curtain gas flow mechanism for directing a curtain gas into the flow passage and the annular gap.