Grove Valve and Regulator Company

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4917354 Dual action ball valveExpiredJan 10, 89Apr 17, 90[F16K]
4593915 Orifice plate seal ringExpiredNov 28, 84Jun 10, 86[F16L, F16J]
4566488 Multi-stage pressure reducing systemExpiredOct 28, 80Jan 28, 86[F16K, G05D]
4545231 Method of manufacturing a weld neck flangeExpiredJul 30, 84Oct 08, 85[B21D]
4540025 Throttling ball valveExpiredMar 28, 83Sep 10, 85[F16K]
4476730 Orifice meter with pressure venting and equalizing safety deviceExpiredSep 30, 82Oct 16, 84[G01F]
4471799 Line removable ball valveExpiredJan 11, 82Sep 18, 84[F16K]
4437486 Line removable valve structure with pipeline support meansExpiredApr 08, 82Mar 20, 84[F16K]
4431022 Line removable valve structure with extensible seal rings on valve cartridgeExpiredJan 13, 82Feb 14, 84[F16K]
4425806 Modular orifice meter with isolation chamber valve closureExpiredMar 29, 82Jan 17, 84[G01F]
4416301 Annular piston valveExpiredJun 22, 81Nov 22, 83[F16K]
4413532 Orifice meter with isolation valve on the carrierExpiredMar 29, 82Nov 08, 83[G01F]
4412554 Fire safe expansible tube type valveExpiredJul 29, 81Nov 01, 83[F16L]
4410010 Orifice meter with isolation chamber seal on the orifice disc carrierExpiredFeb 08, 82Oct 18, 83[F15D]
4399708 Orifice meter with rotatable isolation sealing memberExpiredDec 24, 81Aug 23, 83[G01F]
4394826 Orifice meter with isolation valve on the carrierExpiredDec 24, 81Jul 26, 83[G01F]
4387735 Line removable valve structure with extensible seal rings on pipeline support structureExpiredFeb 16, 82Jun 14, 83[F16K]
4380936 Tube mounting for orifice meterExpiredJun 08, 81Apr 26, 83[G01F]
4364410 Bi-directional flow control systemExpiredAug 21, 80Dec 21, 82[G05D]
4345738 Fire safe sealExpiredAug 25, 80Aug 24, 82[F16K]

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