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:
Apr. 07, 2009
Filed:
May. 04, 2005
Gary L. Glish, Chapel Hill, NC (US);
Desmond Kaplan, Durham, NC (US);
Gary L. Glish, Chapel Hill, NC (US);
Desmond Kaplan, Durham, NC (US);
The University of North Carolina at Chapel Hill, Chapel Hill, NC (US);
Abstract
A mass spectrometer according to one embodiment can include first and second endcap electrodes, first and second outer ring electrodes, and a central ring electrode. The first outer ring electrode can be positioned downstream of the first endcap electrode. The central ring electrode can be positioned downstream of the first outer ring electrode. The second outer ring electrode can be positioned downstream of the central ring electrode. The second endcap electrode can be positioned downstream of the second outer ring electrode. The mass spectrometer can also include a radio frequency (RF) signal supply operable to apply an RF signal to the first and second outer ring electrodes to thereby generate a substantially octapolar field for trapping charged particles.