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Patent

Hänvisningar finns i följande patent

citeras i Registreringsdatum Utfärdandedatum Ursprunglig innehavare Titel
US41881736 okt 197612 feb 1980The United States of America as represented by the Department of EnergyVertical pump with free floating check valve
US456317319 apr 19837 jan 1986National Biomedical Research FoundationPump-actuated sequencing valve and system
US465524717 jan 19867 apr 1987Chromalloy American CorporationBall-type check valve assembly
US494594726 maj 19897 aug 1990Chromalloy American CorporationBall-type check valve
US497956221 okt 198825 dec 1990Weatherford U.S., Inc.Float equipment including float collars and modular plugs for well operations
US541104918 mar 19942 maj 1995Weatherford U.S., Inc.Valve
US54509031 aug 199419 sep 1995Weatherford/Lamb, Inc.Fill valve
US547454131 aug 199312 dec 1995Astra Pharma, Inc.Valved nozzle for re-usable reservoir of a flowable product
US568090229 apr 199628 okt 1997Weatherford/Lamb, Inc.Wellbore valve
US569017729 apr 199625 nov 1997Weatherford Lamb, Inc.Fill valve
US58363954 jun 199717 nov 1998Weatherford/Lamb, Inc.Valve for wellbore use
US590977124 nov 19978 jun 1999Weatherford/Lamb, Inc.Wellbore valve

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