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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6656738 Internal heater for preconcentratorExpiredNov 17, 99Dec 02, 03[G01N]
6455003 Preconcentrator for chemical detectionExpiredNov 17, 99Sep 24, 02[G01N]
6363773 High-sensitivity instrument to measure NVR in fluidsExpiredApr 18, 00Apr 02, 02[G01N, H03H]
6321588 Chemical sensor arrayExpiredSep 11, 98Nov 27, 01[G01N]
6122954 High sensitivity instrument to measure NVR in fluidExpiredAug 21, 98Sep 26, 00[G01N, H03H]
5918258 High-sensitivity instrument to measure NVR in fluidsExpiredJul 11, 96Jun 29, 99[G01N, H03H]
5661226 High sensitivity real-time NVR monitorExpiredNov 09, 95Aug 26, 97[G01N]
5476002 High sensitivity real-time NVR monitorExpiredMay 05, 94Dec 19, 95[H03H]

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