Inventor · disambiguated record
James A. Westhoff
Also filed as: WESTHOFF JAMES · WESTHOFF JAMES A
31 granted patents·4 pending applications·768 citations·filing 1982–2023
98Inventor score
Top patents by PatentIndex Score
35 records- 0194US4387900AMethod and apparatus for providing watertight seal for manhole pipe connectionA LOK PROD·Filed 1982·Granted Jun 14, 1983·91 cites·25 claims
- 0290US6651949B1Apparatus for casting a gasket and associated positioning member into an opening and a cast member for receiving a conduitPOLY TEC PRODUCTS INC·Filed 2000·Granted Nov 25, 2003·28 cites·13 claims
- 0387US4621941AManhole riser having integral flexible waterlock for manhole covers and having a water tight seal for sealed manhole coversA LOK PROD·Filed 1985·Granted Nov 11, 1986·56 cites·30 claims
- 0486US5299884AWater lock method and apparatusPOLY TEC PRODUCTS INC·Filed 1991·Granted Apr 5, 1994·55 cites·45 claims
- 0585US6371436B1Placement ring assembly having magnetic securing meansFiled 2000·Granted Apr 16, 2002·15 cites·11 claims
- 0684US5081802AMethod and apparatus for lining manhole assemblies and the likePOLY TEC PRODUCTS INC·Filed 1990·Granted Jan 21, 1992·50 cites·20 claims
- 0782US4890863AMetallic adjustable clamping band for gasketsA LOK PROD·Filed 1988·Granted Jan 2, 1990·51 cites·13 claims
- 0882US4737220AMethod of making a manhole riser having integral flexible waterlock for manhole covers and having a water tight seal for sealed manhole coversA LOK PROD·Filed 1986·Granted Apr 12, 1988·43 cites·11 claims
- 0980US7677829B2Inserts and reusable holder thereforPOLY TEC PRODUCTS INC·Filed 2005·Granted Mar 16, 2010·13 cites·7 claims
- 1079US4746127AAdjustable clamping band for gaskets and method for using sameA LOK PROD·Filed 1987·Granted May 24, 1988·44 cites·24 claims
- 1178US6568691B1Method and apparatus for forming cast members having embedded boot type gasketsPOLY TEC PRODUCTS INC·Filed 2000·Granted May 27, 2003·22 cites·1 claims
- 1275US7108101B1Manhole insert for manufacture of a cast member and to provide a step insert having increased structural and holding strengthPOLY TEC PRODUCTS INC·Filed 1999·Granted Sep 19, 2006·29 cites·15 claims
- 1375US5248154ABidirectional gasketPOLY TEC PRODUCTS INC·Filed 1991·Granted Sep 28, 1993·43 cites·6 claims
- 1475US4903970AApparatus for providing a watertight seal for manhole pipe connections including a foldable gasket and clamping band assembly and expansion means for installing the gasket and clamping band assemblyA LOK PROD·Filed 1987·Granted Feb 27, 1990·31 cites·8 claims
- 1573US4711455AGasket for use in manholes and including clamping band having cooperating projections and grooves for preventing relative axial movement of the opposing ends of the clamping band during installation and for facilitating expansion by an expansion jackA LOK PROD·Filed 1985·Granted Dec 8, 1987·28 cites·9 claims
- 1670US5054794AClamping band for gaskets and the like and expansion means thereforA LOK PROD·Filed 1989·Granted Oct 8, 1991·26 cites·20 claims
- 1767US6126173AExtruded gasket for cored manholesPOLY TEC PRODUCTS INC·Filed 1998·Granted Oct 3, 2000·31 cites·10 claims
- 1864US7624992B2Gasket packageA LOK PROD·Filed 2006·Granted Dec 1, 2009·3 cites·12 claims
- 1964US6607219B2Expansion type clamping band characterized by simplified design and ease of usePOLY TEC PRODUCTS INC·Filed 2001·Granted Aug 19, 2003·14 cites·42 claims
- 2064US6406025B1Gasket and method for fabrication and use with corrugated pipePOLY TEC PRODUCTS INC·Filed 2001·Granted Jun 18, 2002·20 cites·39 claims
- 2164US5884438ALift insert assembly and fabrication assembly method thereforePOLY TEC PRODUCTS INC·Filed 1997·Granted Mar 23, 1999·19 cites·40 claims
- 2261US8794639B2Sealing assembly having liquid-filled sealWESTHOFF JAMES A·Filed 2009·Granted Aug 5, 2014·7 cites·18 claims
- 2361US2025164055A1Multi-dimensional spacerA LOK PROD·Filed 2023·Application pending·0 cites
- 2457US6921085B2Packaging design incorporating gasket clamping assemblies and installation instructionsPOLY TEC PRODUCTS INC·Filed 2003·Granted Jul 26, 2005·9 cites·17 claims
- 2556US10954668B2Removable and replaceable anchored tunnel gasketVERTEX INC·Filed 2019·Granted Mar 23, 2021·0 cites·20 claims
- 2651US7918464B2Gasket packageA LOK PROD·Filed 2007·Granted Apr 5, 2011·0 cites·17 claims
- 2751US2005188645A1Inserts and method and apparatus for embedding inserts in cast membersPOLY TEC PRODUCTS INC·Filed 2005·Application pending·0 cites
- 2848US11401810B2Removable and replaceable anchored tunnel gasketVERTEX INC·Filed 2020·Granted Aug 2, 2022·0 cites·17 claims
- 2945US5997006ABidirectional gasket having water energizing pocketsPOLY TEC PRODUCTS INC·Filed 1997·Granted Dec 7, 1999·14 cites·9 claims
- 3045US2003218304A1Boot connector designed to be cast in radial progression and method and apparatus for its production and usePOLY TECH PRODUCTS INC·Filed 2003·Application pending·0 cites
- 3144US6196517B1Placement ring assembly having cushioned knockout assemblyPOLY TEC PRODUCTS INC·Filed 1998·Granted Mar 6, 2001·6 cites·7 claims
- 3239US5860254ALift insert assembly and fabrication assembly methodPOLY TEC PRODUCTS INC·Filed 1996·Granted Jan 19, 1999·7 cites·28 claims
- 3338US2012025471A1Self adjusting gasket for pipe jointsANDRICK WILLIAM C·Filed 2011·Application pending·0 cites
- 3437USRE34787EBidirectional gasket having water energizing pocketsPOLY TEC PRODUCTS INC·Filed 1993·Granted Nov 15, 1994·7 cites·13 claims
- 3536US5217237ABidirectional gasket having water energizing pocketsPOLY TEC PRODUCTS INC·Filed 1992·Granted Jun 8, 1993·6 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →