Koomey, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4887643 Pilot actuated spool valveExpiredMar 01, 82Dec 19, 89[F15B]
4699355 Fail-safe fluid piloted valve positioner with hydromechanical position lockExpiredNov 01, 84Oct 13, 87[F16K, F15B, F16J]
4638972 Valve apparatusExpiredJul 18, 85Jan 27, 87[E21B]
4565349 Fail safe hydraulic piloted pressure reducing and regulating valveExpiredMar 20, 84Jan 21, 86[G05D]
4554940 Pressure reducing and regulating valveExpiredSep 09, 83Nov 26, 85[F16K, G05D]
4519636 Seal for an underwater connectorExpiredOct 20, 82May 28, 85[F16L]
4518005 Guided float accumulatorExpiredMar 03, 83May 21, 85[F16L]
4475568 Pressure reducing and regulating valveExpiredMar 22, 83Oct 09, 84[G05D]
4453566 Hydraulic subsea control system with disconnectExpiredApr 29, 82Jun 12, 84[F16L]
4448394 High low safety apparatus for drilling rigsExpiredSep 30, 82May 15, 84[B66D, B66B]
4445255 Hose clamp for supporting a vertically extending control lineExpiredMay 19, 82May 01, 84[F16L, B65D]
4444216 Pressure reducing and regulating valveExpiredJan 15, 82Apr 24, 84[F16K, G05D]
4444218 Underwater fluid connectorExpiredApr 26, 82Apr 24, 84[E21B]
4440232 Well pressure compensation for blowout preventersExpiredJul 26, 82Apr 03, 84[E21B]
4413652 Gas-liquid accumulatorExpiredMar 30, 81Nov 08, 83[F16L]
4404989 Underwater connector for fluid linesExpiredAug 03, 81Sep 20, 83[F16L]
4337653 Blowout preventer control and recorder systemExpiredApr 29, 81Jul 06, 82[E03B, E21B]
4328826 Underwater fluid connectorExpiredOct 30, 80May 11, 82[E21B]
4301827 Accumulator with preclosing preventerExpiredFeb 25, 80Nov 24, 81[F16K, B67D]
4294288 Accumulator with float orienting meansExpiredFeb 25, 80Oct 13, 81[F16L]

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