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. 09, 2014
Filed:
Dec. 23, 2005
Alastair Clark, Watford, GB;
John Patrick Fitzgerald, Watford, GB;
Stephen John Taylor, Amersham, GB;
Robert Brian Turner, Chesham, GB;
Alastair Clark, Watford, GB;
John Patrick Fitzgerald, Watford, GB;
Stephen John Taylor, Amersham, GB;
Robert Brian Turner, Chesham, GB;
Smiths Group PLC, London, GB;
Abstract
An IMS or other analytical instrument has a corona discharge needle () to ionize sample gases or vapours. A gate () is opened or closed to admit or prevent entry of the ions produced by the corona discharge to a drift chamber (). The operation of the corona discharge needle () and the gate () are controlled such that the gate is open during at least two discharges, to admit faster ions produced by the most recent discharge together with slower ions produced by an earlier discharge.