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:
Jan. 02, 1990
Filed:
Feb. 01, 1988
VG Instruments Group Limited, Crawley, GB;
Abstract
A mass spectrometer (1) suitable for the analysis of the eluent of a liquid or supercritical fluid chromatograph is disclosed. In order to maximize the flow rate of fluid which can be accepted into its ionization chamber (13), aperture closing means (13) are provided between an electron or particle source (27) and an entrance aperture (40) into the ionization chamber through which electrons or particles enter the chamber when required to ionize the sample therein. The aperture closing means are operable to close said aperture when such ionization is not required, thereby increasing the maximum flow rate into the ionization chamber. Sample ionization may then be effected by means of a glow discharge in the chamber or by a liquid ionization process such as thermospray ionization.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile