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. 04, 2009
Filed:
Jan. 13, 2006
Gholamreza Javahery, Kettleby, CA;
Lisa Cousins, Woodbridge, CA;
Charles Jolliffe, Schomberg, CA;
Ilia Tomski, Concord, CA;
Gholamreza Javahery, Kettleby, CA;
Lisa Cousins, Woodbridge, CA;
Charles Jolliffe, Schomberg, CA;
Ilia Tomski, Concord, CA;
Ionics Mass Spectrometry Group Inc., Concord, unknown;
Abstract
An ion guide includes multiple stages. An electric field within each stage guides ions along a guide axis. Within each stage, amplitude and frequency, and resolving potential of the electric field may be independently varied. The geometry of the rods maintains a similarly shaped field from stage to stage, allowing efficient guidance of the ions along the axis. In particular, each rod segment of the iof stage has a cross sectional radius r, and a central axis located a distance R+rfrom the guide axis. The ratio r/Rand is substantially constant along the guide axis, thereby preserving the shape of the field.