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:
Sep. 04, 2018
Filed:
May. 11, 2015
Hitachi High-technologies Corporation, Tokyo, JP;
Kiyomi Yoshinari, Tokyo, JP;
Yasushi Terui, Tokyo, JP;
HITACHI HIGH-TECHNOLOGIES CORPORATION, Tokyo, JP;
Abstract
The objective of the presently disclosed subject matter is to provide a mass spectrometer that improves the ionic permeability ratio at the entrance to an ion transport part or the entrance to a mass spectrometry part, and to acquire a high-sensitivity mass spectrum. To reduce the electric-field distortion that is caused by ion loss, electrodes are arranged so that the radius of a circle inscribed within the electrodes of the ion transport part is larger than the radius of a circle inscribed within the electrodes of the mass spectrometry part. The entrance to the electrodes of the mass spectrometry part also can have a tapered, inclined, folded-over, or rounded configuration. Together, these reduce the sharply fluctuating (peak-shaped) distribution of electric potential generated near the entrance to the ion transport part and the entrance to the mass spectrometry part.