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:
Jul. 12, 2011
Filed:
Jan. 09, 2007
Jonathan Richard Atkinson, Watford, GB;
Alastair Clark, Watford, GB;
Bruce Alexander Colin Grant, Finchley, GB;
Robert Brian Turner, Chesham, GB;
Jonathan Richard Atkinson, Watford, GB;
Alastair Clark, Watford, GB;
Bruce Alexander Colin Grant, Finchley, GB;
Robert Brian Turner, Chesham, GB;
Smith Detection-Watford Limited, Watford Herts, GB;
Abstract
An ion mobility spectrometer or other ion apparatus has two or three grid electrodesandtoand' and′ extending laterally of the ion flowpath. An asymmetric waveform with a dc compensating voltage is applied between the electrodes to produce a field parallel to the ion flow path that affects ions differently according to their field-dependent mobility. This filters or delays different ions selectively in their passage to an ion detector′ to facilitate discrimination between ions that would otherwise produce a similar output.