Impact MST Incorporated

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6148716 Low noise high efficiency positive displacement pumpExpiredDec 16, 98Nov 21, 00[F01B]
6068680 Rapid cycle pressure swing adsorption oxygen concentration method and apparatusExpiredOct 27, 98May 30, 00[B01D]
5827358 Rapid cycle pressure swing adsorption oxygen concentration method and apparatusExpiredNov 08, 96Oct 27, 98[B01D]
5484268 Positive displacement centrifugal pumpExpiredJul 15, 93Jan 16, 96[F04B]
5228840 Positive displacement pumpsExpiredJan 02, 91Jul 20, 93[F04B]
4990062 Positive displacement pumpsExpiredNov 14, 88Feb 05, 91[F04B]

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