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:
Mar. 16, 2004
Filed:
May. 28, 2003
Akihiko Okumura, Hachioji, JP;
Izumi Waki, Asaka, JP;
Hitachi-High Technologies Corporation, Tokyo, JP;
Abstract
In the time-of-flight mass spectrometer, after ions are accumulated in a quadrupole ion trap in a low vacuum chamber, the ions are ejected and transferred to a high vacuum chamber and are accelerated by an acceleration electrode in a direction orthogonal to the traveling direction of ions, and time of flight for the accelerated ions is measured. Total content of detected ions is calculated with a data processing unit. An ion introduction time for the next operation is determined on the basis of the obtained total ion content, the time for introduction of ions into the ion trap and a preset threshold value of the total ion content. The threshold value of total ion content is set such that the ions ejected out of the ion trap can pass through a slit formed in a partition wall for portioning the low vacuum chamber and the high vacuum chamber.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile