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. 24, 2010
Filed:
May. 21, 2008
Michael W. Senko, Sunnyvale, CA (US);
Viatcheslav V. Kovtoun, Santa Clara, CA (US);
Paul R. Atherton, San Jose, CA (US);
Jean Jacques Dunyach, San Jose, CA (US);
Eloy R. Wouters, San Jose, CA (US);
Maurizio Splendore, Walnut Creek, CA (US);
William Siebert, Los Altos, CA (US);
Michael W. Senko, Sunnyvale, CA (US);
Viatcheslav V. Kovtoun, Santa Clara, CA (US);
Paul R. Atherton, San Jose, CA (US);
Jean Jacques Dunyach, San Jose, CA (US);
Eloy R. Wouters, San Jose, CA (US);
Maurizio Splendore, Walnut Creek, CA (US);
William Siebert, Los Altos, CA (US);
Thermo Finnigan LLC, San Jose, CA (US);
Abstract
A device for transporting and focusing ions in a low vacuum or atmospheric-pressure region of a mass spectrometer is constructed from a plurality of longitudinally spaced apart electrodes to which oscillatory (e.g., radio-frequency) voltages are applied. In order to create a tapered field that focuses ions to a narrow beam near the device exit, the inter-electrode spacing or the oscillatory voltage amplitude is increased in the direction of ion travel.