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:
Dec. 28, 2010
Filed:
Mar. 07, 2006
Shuichi Kawana, Osaka, JP;
Manabu Shimomura, Kyoto, JP;
Shuichi Kawana, Osaka, JP;
Manabu Shimomura, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
A filamentfor generating thermions is remotely located from an ionization chamberso that a thermion-accelerating electric field created by a potential difference between the filamentand the ionization chamberis prevented from penetrating through an electron injection portinto the ionization chamber. This design eliminates the disturbance of an ion-extracting electric field created within the ionization chamberby a voltage applied to lens electrodes, thus enabling ions produced within the ionization chamberto be efficiently extracted and transported to a mass analyzer located at the subsequent stage. As a result, the level of detection signals of a detector is increased, so that the mass analysis can be performed with high sensitivity.