Inventor · disambiguated record
Kenneth Wayne Leffew
Also filed as: LEFFEW KENNETH W · LEFFEW KENNETH WAYNE
28 granted patents·1 pending application·816 citations·filing 1984–2009
97Inventor score
Files withDU PONT20LEFFEW KENNETH WAYNE3ATEN RALPH MUNSON2E I DU PONR DE NEMOURS AND COM1INVISTA NORTH AMERICA SARL1
Top patents by PatentIndex Score
29 records- 0195US5540868AProcess for pellet formation from amorphous polyesterDU PONT·Filed 1995·Granted Jul 30, 1996·110 cites·36 claims
- 0292US5510454AProduction of poly(ethylene terephthalate)DU PONT·Filed 1995·Granted Apr 23, 1996·63 cites·17 claims
- 0391US5633018AApparatus for forming crystalline polymer pelletsDU PONT·Filed 1995·Granted May 27, 1997·94 cites·20 claims
- 0489US5714262AProduction of poly(ethylene terephthalate)DU PONT·Filed 1995·Granted Feb 3, 1998·52 cites·7 claims
- 0587US5532333AProduction of poly(ethylene terephthalate)DU PONT·Filed 1995·Granted Jul 2, 1996·44 cites·17 claims
- 0684US5830982AProduction of poly (ethylene terephthalate)DU PONT·Filed 1997·Granted Nov 3, 1998·40 cites·42 claims
- 0784US5811496AProcess for polymerization of polyester oligomersDU PONT·Filed 1995·Granted Sep 22, 1998·78 cites·19 claims
- 0884US5017451AContinuous process for preparing resin particles in a liquidDU PONT·Filed 1989·Granted May 21, 1991·27 cites·55 claims
- 0983US8058376B2Fluoropolymer produced by aqueous polymerization using dispersed particulate of fluorinated lonomer produced in situATEN RALPH MUNSON·Filed 2009·Granted Nov 15, 2011·7 cites·29 claims
- 1083US5763104AProduction of poly(trimethylene terephthalate)DU PONT·Filed 1996·Granted Jun 9, 1998·37 cites·25 claims
- 1181US5990265AProduction of poly(trimethylene terephthalate)DU PONT·Filed 1998·Granted Nov 23, 1999·35 cites·23 claims
- 1280US6409491B1Extrusion die assemblyDU PONT·Filed 2001·Granted Jun 25, 2002·18 cites·6 claims
- 1374US6451966B1Method for increasing solid state polymerization rateDU PONT·Filed 2001·Granted Sep 17, 2002·12 cites·8 claims
- 1473US6476180B1Process for producing an oriented shaped articleDU PONT·Filed 2001·Granted Nov 5, 2002·10 cites·12 claims
- 1573US5744074AProcess for forming crystalline polymer pelletsDU PONT·Filed 1996·Granted Apr 28, 1998·29 cites·3 claims
- 1671US8436053B2Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomerLEFFEW KENNETH WAYNE·Filed 2009·Granted May 7, 2013·2 cites·22 claims
- 1771US5730913AProcess for forming crystalline polymer pelletsDU PONT·Filed 1996·Granted Mar 24, 1998·27 cites·11 claims
- 1869US5176859AApparatus/and method for controlling an injection molding process producing a molded partPHILIPS & DU PONT OPTICAL·Filed 1991·Granted Jan 5, 1993·30 cites·4 claims
- 1967US5206108AMethod of producing a high solids replenishable liquid developer containing a friable toner resinXEROX CORP·Filed 1991·Granted Apr 27, 1993·18 cites·27 claims
- 2065US8153738B2Fluoropolymer produced by aqueous polymerization using dispersed particulate of fluorinated ionomerLEFFEW KENNETH WAYNE·Filed 2009·Granted Apr 10, 2012·1 cites·27 claims
- 2165US5670606ACrystalline form of poly(ethylene 2,6-naphthalate) and a method for its productionDU PONT·Filed 1996·Granted Sep 23, 1997·20 cites·26 claims
- 2262US4804557AThickness control system having a duty cycle controllerDU PONT·Filed 1984·Granted Feb 14, 1989·23 cites·7 claims
- 2358US8835547B2Fluoropolymer particles having a nucleus of fluorinated ionomerLEFFEW KENNETH WAYNE·Filed 2009·Granted Sep 16, 2014·1 cites·6 claims
- 2454US4810527AFree surface casting methodDU PONT·Filed 1987·Granted Mar 7, 1989·13 cites·14 claims
- 2552US8436054B2Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomer produced in situATEN RALPH MUNSON·Filed 2009·Granted May 7, 2013·0 cites·23 claims
- 2651US4765941AThickness control system for an extrusion coating apparatusDU PONT·Filed 1987·Granted Aug 23, 1988·15 cites·17 claims
- 2744US4804556AEdge thickness control systemDU PONT·Filed 1984·Granted Feb 14, 1989·10 cites·1 claims
- 2843US6835335B2Process for crystallizing at least a portion of a crystallizable condensation homopolymer to form solid particlesINVISTA NORTH AMERICA SARL·Filed 2002·Granted Dec 28, 2004·0 cites·13 claims
- 2942US2010036064A1Semibatch copolymerization process for compositionally uniform copolymersE I DU PONR DE NEMOURS AND COM·Filed 2007·Application pending·0 cites
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