Inventor · disambiguated record
Wilfred P. Shum
Also filed as: PO-SUM SHUM WILFRED · SHUM WILFRED P · SHUM WILFRED P-S · SHUM WILFRED PO-SUM
27 granted patents·290 citations·filing 1981–2009
96Inventor score
Files withARCO CHEM TECH15ATLANTIC RICHFIELD CO7ARCO CHEM CO2LYONDELL CHEMICAL TECH LP2SHUM WILFRED PO-SUM1
Top patents by PatentIndex Score
27 records- 0193US7612241B1Hydroformylation processLYONDELL CHEMICAL TECH LP·Filed 2009·Granted Nov 3, 2009·18 cites·15 claims
- 0293US4522934AVanadotungstomolybdophosphoric acid oxidation catalystATLANTIC RICHFIELD CO·Filed 1983·Granted Jun 11, 1985·42 cites·4 claims
- 0391US6225509B1Allyl alcohol hydroformylationARCO CHEM TECH·Filed 2000·Granted May 1, 2001·28 cites·6 claims
- 0486US6426437B1Hydroformylation processARCO CHEM TECH·Filed 2000·Granted Jul 30, 2002·16 cites·12 claims
- 0583US6969780B1Production of butanediolLYONDELL CHEMICAL TECH LP·Filed 2004·Granted Nov 29, 2005·13 cites·6 claims
- 0679US5780655AEpoxidation process using a phosphate-stabilized peroxotungstate compound as catalystARCO CHEM TECH·Filed 1997·Granted Jul 14, 1998·22 cites·20 claims
- 0774US6803491B1Preparation of lithium phosphate catalystsARCO CHEM TECH·Filed 2003·Granted Oct 12, 2004·12 cites·25 claims
- 0870US5241118AProcess for the preparation of trisubstituted ureas by reductive carbonylationARCO CHEM TECH·Filed 1991·Granted Aug 31, 1993·11 cites·25 claims
- 0969US5103027AOlefin expoxidation using an oxorhenium porphyrin complex catalyst and an organic hydroperoxideARCO CHEM TECH·Filed 1991·Granted Apr 7, 1992·10 cites·20 claims
- 1069US4558154AOxidation of isobutylene oxide to methacrylic acid and methacroleinATLANTIC RICHFIELD CO·Filed 1981·Granted Dec 10, 1985·9 cites·9 claims
- 1169US4537998AProcess for the oxidation of isobutylene oxide to methacroleinATLANTIC RICHFIELD CO·Filed 1984·Granted Aug 27, 1985·9 cites·9 claims
- 1267US6127584AButanediol productionARCO CHEM TECH·Filed 1999·Granted Oct 3, 2000·18 cites·4 claims
- 1367US5118822AOlefin epoxidation using a perrhenate catalyst and an organic hydroperoxideARCO CHEM TECH·Filed 1991·Granted Jun 2, 1992·9 cites·29 claims
- 1467US4764628AAsymmetric epoxidation of allylic alcoholsARCO CHEM CO·Filed 1987·Granted Aug 16, 1988·7 cites·2 claims
- 1559US5288882AProcess for recovering an optically active epoxy alcoholARCO CHEM TECH·Filed 1992·Granted Feb 22, 1994·6 cites·21 claims
- 1657US5252759AProcess for producing optically active epoxy alcohol derivativesARCO CHEM TECH·Filed 1993·Granted Oct 12, 1993·5 cites·20 claims
- 1757US4612390AMethod for producing branched carbonylation products from alpha unsaturated olefinsATLANTIC RICHFIELD CO·Filed 1982·Granted Sep 16, 1986·5 cites·14 claims
- 1857US4607113AProduction of molybdenum dioxo dialkyleneglycolate compositions for epoxidation of olefinsATLANTIC RICHFIELD CO·Filed 1984·Granted Aug 19, 1986·12 cites·14 claims
- 1955US5166371AAsymmetric epoxidation using a chiral hydroperoxideARCO CHEM TECH·Filed 1991·Granted Nov 24, 1992·6 cites·31 claims
- 2053US5278070AProcess for producing epoxyalcohols of high optical purityARCO CHEM TECH·Filed 1992·Granted Jan 11, 1994·5 cites·6 claims
- 2150US4687868AProduction of molybdenum dioxo dialkyleneglycolate compositions for epoxidation of olefinsATLANTIC RICHFIELD CO·Filed 1986·Granted Aug 18, 1987·10 cites·5 claims
- 2247US8722557B2Catalyst regenerationSHUM WILFRED PO-SUM·Filed 2008·Granted May 13, 2014·0 cites·9 claims
- 2345US5495052AProcess for producing enantiomerically enriched guaifenesinARCO CHEM TECH·Filed 1994·Granted Feb 27, 1996·5 cites·14 claims
- 2443US4772731AEpoxidation of olefins with molybdenum dioxo dialkyleneglycolate compositionsARCO CHEM CO·Filed 1986·Granted Sep 20, 1988·7 cites·4 claims
- 2539US5663384AAsymetric epoxidation using a titanium-containing zeolite and a chiral hydroperoxideARCO CHEM TECH·Filed 1996·Granted Sep 2, 1997·1 cites·17 claims
- 2628US4607122AHigh selectivity process for vapor phase oxydehydrogenation of alkanoic acids, such as isobutyric acid, using Dawson structure phosphomolybdic acidATLANTIC RICHFIELD CO·Filed 1981·Granted Aug 19, 1986·0 cites·7 claims
- 2726US4935101AProcess for the recovery of a water-insoluble epoxy alcoholARCO CHEM TECH·Filed 1989·Granted Jun 19, 1990·4 cites·27 claims
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