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. 21, 2002
Filed:
Mar. 12, 1999
Yasuaki Takada, Kodaira, JP;
Takayuki Nabeshima, Kokubunji, JP;
Minoru Sakairi, Tokorozawa, JP;
Yukiko Hirabayashi, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a mass spectrometer having an ion trap type mass spectrometric unit, characterized in that in each of ion storage periods, ions created in an ion source ( ) are allowed to enter in a space surrounded by a ring electrode ( ) and end cap electrodes ( and ) and are confined in the space, wherein ions are detected with high sensitivities in a wide range of values of m/z (molecular weight of ion/valence number of ion) of the ions by changing the amplitude of a high-frequency voltage applied to the ring electrode ( ) in each of the ion storage periods.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile