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. 04, 2010
Filed:
Dec. 31, 2007
Edward Geraghty, Tyngsboro, MA (US);
Vladimir Kekukh, Chestnut Hill, MA (US);
Stephen N. Bunker, Wakefield, MA (US);
Edward Geraghty, Tyngsboro, MA (US);
Vladimir Kekukh, Chestnut Hill, MA (US);
Stephen N. Bunker, Wakefield, MA (US);
Implant Sciences Corporation, Wilmington, MA (US);
Abstract
An explosive and narcotics detection system using an ion mobility spectrometer detects the presence of vapor or trace particles of target chemicals. The calibration of the spectrometer depends in part on the stability of a calibrant chemical that may be periodically injected together with sample gas into the ionization region of the spectrometer. The calibrant chemical produces a signal with a drift time that is known relative to target chemicals and may be used to calibrate the expected target chemical drift times. A new calibrant chemical, 5-nitrovanillin, is disclosed for this purpose.