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:
May. 30, 2006
Filed:
Mar. 04, 2005
Rohan Thakur, San Jose, CA (US);
Rohan Thakur, San Jose, CA (US);
Thermo Finnigan LLC, San Jose, CA (US);
Abstract
Ion transfer assemblies and methods for directing ions from an ionization source to a mass analyzer. A first partition element separates a viscous flow region from a transition flow region. A second partition element separates the transition flow region into a first transition flow chamber and a second transition flow chamber. A focusing element defines a cavity shaped to direct a portion of a gas flow including ions entrained in a background gas from a first aperture in the first partition element towards a second aperture in the second partition element based on gas dynamics. The cavity is shaped to direct the gas flow without requiring the application of external electrostatic fields. Vents or slits can be provided in or between the first partition element and the focusing element to provide for expansion of the gas flow in the transition flow region.