Assignee
HANCOR INC
US·46 granted patents·2 pending applications·1,675 citations·filing 1974–2005
Top patents by PatentIndex Score
48 records- 0198US4523613AMulti-layered corrugated conduit with "black-eye" like aperturesHANCOR INC·Filed 1981·Granted Jun 18, 1985·122 cites·7 claims
- 0294US4245924AArch conduitHANCOR INC·Filed 1978·Granted Jan 20, 1981·87 cites·31 claims
- 0393US6698975B1Coupling structure for a leaching chamberHANCOR INC·Filed 2002·Granted Mar 2, 2004·61 cites·22 claims
- 0493US4247136AInternal coupling structure and joint for pipe or tubingHANCOR INC·Filed 1978·Granted Jan 27, 1981·95 cites·40 claims
- 0591US7033496B2Water clarification system with weirHANCOR INC·Filed 2005·Granted Apr 25, 2006·38 cites·14 claims
- 0691US4360042AArched conduit with improved corrugationsHANCOR INC·Filed 1980·Granted Nov 23, 1982·72 cites·24 claims
- 0791US4022384AIrrigation tubingHANCOR INC·Filed 1975·Granted May 10, 1977·93 cites·17 claims
- 0889US4359167ASubterranean plastic tankHANCOR INC·Filed 1980·Granted Nov 16, 1982·60 cites·25 claims
- 0988US6199592B1Pipe structure and method of manufactureHANCOR INC·Filed 1999·Granted Mar 13, 2001·65 cites·38 claims
- 1088US4709723ASeptic tank for alternative sewer systemsHANCOR INC·Filed 1986·Granted Dec 1, 1987·67 cites·16 claims
- 1188US4286808ASnap-in tee connectorHANCOR INC·Filed 1979·Granted Sep 1, 1981·53 cites·15 claims
- 1283US5556231ASeverable leaching chamber with end capHANCOR INC·Filed 1994·Granted Sep 17, 1996·67 cites·14 claims
- 1383US4480855ACoupling structure for plastic pipe or tubingHANCOR INC·Filed 1982·Granted Nov 6, 1984·41 cites·10 claims
- 1483US4082327AConnecting joint for corrugated plastic tubingHANCOR INC·Filed 1976·Granted Apr 4, 1978·56 cites·11 claims
- 1582US5326138AHigh pressure coupling for plastic pipe and conduitHANCOR INC·Filed 1992·Granted Jul 5, 1994·63 cites·17 claims
- 1680USD477381SLeaching chamberHANCOR INC·Filed 2002·Granted Jul 15, 2003·21 cites·1 claims
- 1779USD537912SLeaching chamberHANCOR INC·Filed 2005·Granted Mar 6, 2007·25 cites·1 claims
- 1879US4527319AMethod and apparatus for manufacturing foldable conduitHANCOR INC·Filed 1981·Granted Jul 9, 1985·41 cites·57 claims
- 1978US6907997B2Water clarification system with coalescing platesHANCOR INC·Filed 2003·Granted Jun 21, 2005·39 cites·21 claims
- 2078US5415436AHigh pressuure coupling for plastic pipe and conduitHANCOR INC·Filed 1994·Granted May 16, 1995·49 cites·17 claims
- 2177US4402898ACoextrusion die assemblyHANCOR INC·Filed 1981·Granted Sep 6, 1983·36 cites·33 claims
- 2277US4363732AInlet and outlet baffle structure for sewage treatment tanksHANCOR INC·Filed 1980·Granted Dec 14, 1982·38 cites·8 claims
- 2377US4254885ASubterranean plastic tankHANCOR INC·Filed 1979·Granted Mar 10, 1981·33 cites·49 claims
- 2476US6941972B2Corrugated pipeHANCOR INC·Filed 2002·Granted Sep 13, 2005·26 cites·18 claims
- 2576US6578882B2Corrugated pipe structureHANCOR INC·Filed 2001·Granted Jun 17, 2003·24 cites·20 claims
- 2674US4397585AApparatus for inserting foldable conduit below groundHANCOR INC·Filed 1981·Granted Aug 9, 1983·35 cites·29 claims
- 2771US6660199B2Pipe structure and method of manufactureHANCOR INC·Filed 2001·Granted Dec 9, 2003·14 cites·5 claims
- 2870US6840285B2Corrugation structure for pipeHANCOR INC·Filed 2002·Granted Jan 11, 2005·15 cites·9 claims
- 2970US5669733AAngled adapter for a leaching chamber systemHANCOR INC·Filed 1995·Granted Sep 23, 1997·46 cites·18 claims
- 3068US7063108B2Corrugation structure for pipeHANCOR INC·Filed 2004·Granted Jun 20, 2006·13 cites·18 claims
- 3166USD474524SLeaching chamberHANCOR INC·Filed 2002·Granted May 13, 2003·14 cites·1 claims
- 3263USD538882SLeaching chamber end capHANCOR INC·Filed 2005·Granted Mar 20, 2007·13 cites·1 claims
- 3363US6565350B2Apparatus for forming a reinforcing structure on an end of a pipeHANCOR INC·Filed 2001·Granted May 20, 2003·9 cites·19 claims
- 3463US4374079AMethod and apparatus for manufacturing expanded and layered semiround plastic tubingsHANCOR INC·Filed 1981·Granted Feb 15, 1983·22 cites·34 claims
- 3563US4357190AMethod and apparatus for manufacturing non-round plastic tubingHANCOR INC·Filed 1980·Granted Nov 2, 1982·22 cites·32 claims
- 3661USD538387SSet of leaching chamber end unitsHANCOR INC·Filed 2005·Granted Mar 13, 2007·12 cites·1 claims
- 3759US3951439AModular cellular conduit assemblyHANCOR INC·Filed 1974·Granted Apr 20, 1976·15 cites·3 claims
- 3857USD538388SLeaching chamber end capHANCOR INC·Filed 2005·Granted Mar 13, 2007·10 cites·1 claims
- 3954USD474525SLeaching chamberHANCOR INC·Filed 2002·Granted May 13, 2003·7 cites·1 claims
- 4051US4296891AExpandable core for rolls of tubingHANCOR INC·Filed 1980·Granted Oct 27, 1981·10 cites·19 claims
- 4145US4445542AArch end capHANCOR INC·Filed 1981·Granted May 1, 1984·8 cites·22 claims
- 4245US4076040AAlternator valveHANCOR INC·Filed 1976·Granted Feb 28, 1978·12 cites·16 claims
- 4342US4509911ACoupling structure and method and apparatus for its manufactureHANCOR INC·Filed 1983·Granted Apr 9, 1985·10 cites·4 claims
- 4441US2006012166A1Articulating pipe jointHANCOR INC·Filed 2005·Application pending·0 cites
- 4539US3943971ADiverter valveHANCOR INC·Filed 1974·Granted Mar 16, 1976·6 cites·9 claims
- 4637US2006157405A1Water clarification system with coalescing mediaHANCOR INC·Filed 2005·Application pending·0 cites
- 4733US4020868AAlternator valveHANCOR INC·Filed 1975·Granted May 3, 1977·5 cites·21 claims
- 4830US4179227ADynamic plow assembly and method of operating sameHANCOR INC·Filed 1977·Granted Dec 18, 1979·5 cites·42 claims
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