Inventor · disambiguated record
Sheldon J. Shafer
Also filed as: SHAFER SHELDON · SHAFER SHELDON J · SHAFER SHELDON JAY
36 granted patents·3 pending applications·564 citations·filing 1981–2010
98Inventor score
Top patents by PatentIndex Score
39 records- 0197US5239106AMethod of recovering and purifying diphenylcarbonate from phenolic solutions thereofGEN ELECTRIC·Filed 1992·Granted Aug 24, 1993·78 cites·7 claims
- 0296US5760272AMethod for preparing diaryl carbonates with improved selectivityGEN ELECTRIC·Filed 1997·Granted Jun 2, 1998·74 cites·19 claims
- 0394US7230066B2Polycarbonate—ultem block copolymersGEN ELECTRIC·Filed 2004·Granted Jun 12, 2007·50 cites·24 claims
- 0494US5414151AMethod for making bisphenolGEN ELECTRIC·Filed 1994·Granted May 9, 1995·47 cites·7 claims
- 0585US8218291B2Monomers for preparing polycarbonate resins, methods of preparing the monomers, polycarbonate resins prepared with the monomers, and capacitors comprising the polycarbonate resinsSILVI NORBERTO·Filed 2010·Granted Jul 10, 2012·4 cites·19 claims
- 0685US6303835B1Method for recovering material values from bisphenol tarsGEN ELECTRIC·Filed 2000·Granted Oct 16, 2001·14 cites·24 claims
- 0784US5428075AMethod for regenerating a sulfonated aromatic organic polymeric ion-exchange resin bed having deactivated aminoorganomercaptan groups with phenolGEN ELECTRIC·Filed 1994·Granted Jun 27, 1995·21 cites·7 claims
- 0882US4788249AThermoplastic resins and polyamides compatibilized with polyamide-polyester block copolymersGEN ELECTRIC·Filed 1987·Granted Nov 29, 1988·31 cites·22 claims
- 0978US6486222B2Combination ion exchange resin bed for the synthesis of bisphenol AGEN ELECTRIC·Filed 2001·Granted Nov 26, 2002·19 cites·7 claims
- 1078US5723689AProcess for recovering bisphenolsGEN ELECTRIC·Filed 1996·Granted Mar 3, 1998·18 cites·11 claims
- 1178US4973746AProcess for converting pet scrap to diamine monomersGEN ELECTRIC·Filed 1988·Granted Nov 27, 1990·13 cites·1 claims
- 1274US4937130APolycarbonate container having internal layers of amorphous polyamideGEN ELECTRIC·Filed 1989·Granted Jun 26, 1990·45 cites·13 claims
- 1374US4567249AMelt preparation of polyamide by amide ester interchangeGEN ELECTRIC·Filed 1983·Granted Jan 28, 1986·20 cites·10 claims
- 1469US5981788AMethod for recovering and recycling catalyst constituentsGEN ELECTRIC·Filed 1997·Granted Nov 9, 1999·29 cites·39 claims
- 1568US5898079AMethod for preparing diaryl carbonates employing hexaalkylguanidinium halidesGEN ELECTRIC·Filed 1997·Granted Apr 27, 1999·10 cites·11 claims
- 1666US5312955AMethod for making aromatic organic carbonatesGEN ELECTRIC·Filed 1992·Granted May 17, 1994·9 cites·8 claims
- 1762US4918149APolyphthalatecarbonate/polycarbonate resin blendsGEN ELECTRIC·Filed 1988·Granted Apr 17, 1990·15 cites·9 claims
- 1859US4697034AProcess for making diaryl carbonatesGEN ELECTRIC·Filed 1985·Granted Sep 29, 1987·8 cites·11 claims
- 1955US4788248AThermoplastic resins and polyamides compatibilized with polyamide-polyarylate block copolymersGEN ELECTRIC·Filed 1987·Granted Nov 29, 1988·11 cites·21 claims
- 2054US7371902B2Methods for purifying p,p-bisphenol-AGEN ELECTRIC·Filed 2004·Granted May 13, 2008·3 cites·20 claims
- 2152US5898080AMethod for preparing diaryl carbonates employing hexaalkylguanidinium halidesGEN ELECTRIC·Filed 1997·Granted Apr 27, 1999·4 cites·17 claims
- 2251US7211641B2Liquid crystal polycarbonates and methods of preparing sameGEN ELECTRIC·Filed 2004·Granted May 1, 2007·1 cites·49 claims
- 2351US6680270B2Regeneration of catalysts used in the manufacture of bisphenolsGEN ELECTRIC·Filed 2001·Granted Jan 20, 2004·2 cites·9 claims
- 2446US4407996AStabilized polycarbonate compositionsGEN ELECTRIC·Filed 1981·Granted Oct 4, 1983·6 cites·7 claims
- 2544US4362829APolycarbonates stabilized with sulfolane derivativesGEN ELECTRIC·Filed 1981·Granted Dec 7, 1982·5 cites·5 claims
- 2643US4876317AAmide-urea copolymer and process for the preparation thereofGEN ELECTRIC·Filed 1987·Granted Oct 24, 1989·4 cites·7 claims
- 2743US2012082833A1Polyethermide resins useful for high temperature applications, and related processesSHAFER SHELDON JAY·Filed 2010·Application pending·0 cites
- 2842US2012081833A1Electronic devices containing polyetherimide componentsCAO YANG·Filed 2010·Application pending·0 cites
- 2941US2011292566A1Cyanoresin polymer for dielectric film, process of making and associated articleTAN DANIEL QI·Filed 2010·Application pending·0 cites
- 3039US5908952AMethod for preparing diaryl carbonates employing β-diketone saltsGEN ELECTRIC·Filed 1997·Granted Jun 1, 1999·1 cites·18 claims
- 3139US5280088AThermoplastic blends of a polyamide having low amine end-group concentration and a polymer containing carbonate linkagesGEN ELECTRIC·Filed 1990·Granted Jan 18, 1994·5 cites·2 claims
- 3239US5070177AUltraviolet radiation resistant polyphthalatecarbonate resinGEN ELECTRIC·Filed 1989·Granted Dec 3, 1991·3 cites·3 claims
- 3338US5340885AAmide-ester copolymers and process for the preparation thereofGEN ELECTRIC·Filed 1993·Granted Aug 23, 1994·3 cites·9 claims
- 3438US5019641APolyamide from 1,3 propylene diamine and isophthalic acid compoundGEN ELECTRIC·Filed 1990·Granted May 28, 1991·3 cites·14 claims
- 3537US5336814AMethod for recovering bis hydroxy aromatic organic values and bis aryl carbonate values from scrap aromatic polycarbonateGEN ELECTRIC·Filed 1993·Granted Aug 9, 1994·5 cites·6 claims
- 3633US5756801AMethod of purifying diphenyl carbonate-phenol adductGEN ELECTRIC·Filed 1997·Granted May 26, 1998·0 cites·4 claims
- 3733US5089600AAmide-urea copolymer and process for the preparation thereofGEN ELECTRIC·Filed 1989·Granted Feb 18, 1992·1 cites·14 claims
- 3832US4983718AColor minimization during melt preparation of polyamides with hypophosphorus acidGEN ELECTRIC·Filed 1989·Granted Jan 8, 1991·1 cites·17 claims
- 3931US5516855AAmide-ester copolymers and process for the preparation thereofGEN ELECTRIC·Filed 1995·Granted May 14, 1996·1 cites·9 claims
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