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. 09, 2013
Filed:
Apr. 13, 2011
Applicant:
Jae C. Schwartz, Gilroy, CA (US);
Inventor:
Jae C. Schwartz, Gilroy, CA (US);
Assignee:
Thermo Finnigan LLC, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 59/44 (2006.01); H01J 49/26 (2006.01); H01J 49/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A two-dimensional radial-ejection ion trap is constructed from four apertured electrodes having inwardly facing hyperbolic surfaces, with each electrode being spaced from the centerline by a distance r that is greater than the hyperbolic radius rdefined by the hyperbolic surfaces. This geometry produces a balanced symmetrical trapping field that has a negligible octopole field component and a relatively large dodecapole or icosapolar field component. In one specific implementation, the ion trap is selectably operable as a quadrupole mass filter by applying a filtering DC voltage to the electrodes.