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. 19, 2014
Filed:
Aug. 10, 2010
Hermann Wollnik, Sante Fe, NM (US);
Hermann Wollnik, Sante Fe, NM (US);
Shimadzu Corporation, Kyoto-fu, JP;
Abstract
A curtain-gas filter for a mass- or mobility-spectrometer that bars gases or vapors of a high-flux atmospheric pressure ion source, as we ions of high mobility and charged droplets, from entering an evacuated mass spectrometer or a mobility spectrometer that is at a lower pressure than the main filter volume of the curtain-gas filter. A portion of the ion-source buffer gas in the ion-source plume is sucked through an ion-source buffer gas inlet into the main filter volume of the curtain-gas filter, from where this ion-source gas is exhausted after a properly shaped electric field has pushed a large portion of the embedded ions into an externally provided stream of a clean buffer gas, which is sucked through a passage into a mass- or mobility-spectrometer that is at a lower pressure.