Assignee
ESSEF CORP
US·40 granted patents·1,247 citations·filing 1985–2003
Top patents by PatentIndex Score
40 records- 0188US5900107AFitting installation process and apparatus for a molded plastic vesselESSEF CORP·Filed 1996·Granted May 4, 1999·73 cites·16 claims
- 0288US5121852ADynamic pressure relief seal for pressure vesselsESSEF CORP·Filed 1991·Granted Jun 16, 1992·75 cites·4 claims
- 0387US5819978ATwo piece composite inletESSEF CORP·Filed 1997·Granted Oct 13, 1998·60 cites·5 claims
- 0487US5568878AFilament wound pressure vessel having a reinforced access openingESSEF CORP·Filed 1996·Granted Oct 29, 1996·60 cites·5 claims
- 0586US6485668B1Method for fabricating composite pressure vessels and products fabricated by the methodESSEF CORP·Filed 1998·Granted Nov 26, 2002·68 cites·24 claims
- 0684US6190598B1Method for making thermoplastic composite pressure vesselsESSEF CORP·Filed 1998·Granted Feb 20, 2001·60 cites·24 claims
- 0784US5096083APolyethylene shipping drumESSEF CORP·Filed 1990·Granted Mar 17, 1992·71 cites·19 claims
- 0884US4753726ADistributor for filtersESSEF CORP·Filed 1987·Granted Jun 28, 1988·65 cites·8 claims
- 0981US5368073AHydropneumatic pressure vessel having an improved diaphragm assemblyESSEF CORP·Filed 1993·Granted Nov 29, 1994·49 cites·4 claims
- 1078US6793095B1Blow-molded pressure tank with spin-welded connectorESSEF CORP·Filed 1998·Granted Sep 21, 2004·59 cites·9 claims
- 1178US6660214B2Pressure vessel manufacture methodESSEF CORP·Filed 2002·Granted Dec 9, 2003·15 cites·16 claims
- 1278US6171423B1Method for fabricating composite pressure vesselsESSEF CORP·Filed 1998·Granted Jan 9, 2001·43 cites·28 claims
- 1376US4637435AAntiseal arrangement for hydropneumatic pressure tanksESSEF CORP·Filed 1985·Granted Jan 20, 1987·32 cites·5 claims
- 1475US4705468AApparatus for rotationally casting a plastic tank liner having an access fittingESSEF CORP·Filed 1985·Granted Nov 10, 1987·35 cites·12 claims
- 1572US5045187ARegeneration system for water conditioners such as water softenersESSEF CORP·Filed 1989·Granted Sep 3, 1991·38 cites·18 claims
- 1668US5356589AMethod and apparatus for forming rotationally cast tank liner having an end fittingESSEF CORP·Filed 1993·Granted Oct 18, 1994·41 cites·7 claims
- 1765US7090736B2Pressure vessel prestressing techniqueESSEF CORP·Filed 2003·Granted Aug 15, 2006·6 cites·5 claims
- 1865US5878773AAuxiliary flow path valveESSEF CORP·Filed 1997·Granted Mar 9, 1999·24 cites·7 claims
- 1964US5759414ASwimming pool main drain assemblyESSEF CORP·Filed 1996·Granted Jun 2, 1998·34 cites·8 claims
- 2064US5556497AFitting installation processESSEF CORP·Filed 1995·Granted Sep 17, 1996·24 cites·12 claims
- 2161US6565793B1Method for fabricating composite pressure vesselsESSEF CORP·Filed 1998·Granted May 20, 2003·20 cites·25 claims
- 2261US5526994AFilament-wound isotensoid pressure vessels having geodesic domesESSEF CORP·Filed 1994·Granted Jun 18, 1996·26 cites·8 claims
- 2361US5268096APool drain assemblyESSEF CORP·Filed 1992·Granted Dec 7, 1993·27 cites·3 claims
- 2460US5388720AFlanged diffuser and air cell retainer for pressure vesselESSEF CORP·Filed 1994·Granted Feb 14, 1995·25 cites·10 claims
- 2560US5072851ADynamic pressure relief seal for pressure vesselsESSEF CORP·Filed 1990·Granted Dec 17, 1991·23 cites·6 claims
- 2658USD297560SColloidalizing venturi valveESSEF CORP·Filed 1985·Granted Sep 6, 1988·8 cites·1 claims
- 2757US5308386AAir relief valve for a pressure vesselESSEF CORP·Filed 1993·Granted May 3, 1994·17 cites·20 claims
- 2857USD309364SSalvage drumESSEF CORP·Filed 1987·Granted Jul 17, 1990·7 cites·1 claims
- 2956US6932391B2Quick-release fitting assemblyESSEF CORP·Filed 2003·Granted Aug 23, 2005·7 cites·24 claims
- 3056US4994132AMethod and apparatus for attaching an insert in a hollow bodyESSEF CORP·Filed 1989·Granted Feb 19, 1991·21 cites·24 claims
- 3155US6298553B1Composite pressure vessel with heat exchangerESSEF CORP·Filed 1998·Granted Oct 9, 2001·16 cites·6 claims
- 3255US5866001AFilament wound housing for a reverse osmosis filter cartridgeESSEF CORP·Filed 1996·Granted Feb 2, 1999·21 cites·9 claims
- 3352US5759387AGrey water filter tank recovery system and filter backwashing systemESSEF CORP·Filed 1996·Granted Jun 2, 1998·19 cites·9 claims
- 3451US5484079AHydropneumatic filament-wound pressure vesselESSEF CORP·Filed 1995·Granted Jan 16, 1996·17 cites·16 claims
- 3548US7017771B1Pressure vesselESSEF CORP·Filed 2003·Granted Mar 28, 2006·8 cites·9 claims
- 3648US5545952ASelf grounding lamp for special use in an underwater environmentESSEF CORP·Filed 1994·Granted Aug 13, 1996·20 cites·19 claims
- 3746US5806705ASealing technique for hydropneumatic pressure vesselESSEF CORP·Filed 1997·Granted Sep 15, 1998·17 cites·8 claims
- 3845US5320495APressure switch adaptor for well systemESSEF CORP·Filed 1992·Granted Jun 14, 1994·13 cites·4 claims
- 3930US5574334ASubmerged lamp with self grounding sleeveESSEF CORP·Filed 1995·Granted Nov 12, 1996·0 cites·18 claims
- 4019US4778369AApparatus for changing vertical-axis extrusion diesESSEF CORP·Filed 1987·Granted Oct 18, 1988·3 cites·12 claims
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