Inventor · disambiguated record
William S. Derwin
Also filed as: DERWIN WILLIAM · DERWIN WILLIAM S
14 granted patents·113 citations·filing 1982–2000
91Inventor score
Files withOCCIDENTAL CHEM CO14
Top patents by PatentIndex Score
14 records- 0183US6118018AChlorination and bromination of aromatic compounds at atmospheric pressureOCCIDENTAL CHEM CO·Filed 1999·Granted Sep 12, 2000·46 cites·20 claims
- 0275US6303812B1Isolation of products from selective dehalogenation of haloaromaticsOCCIDENTAL CHEM CO·Filed 2000·Granted Oct 16, 2001·8 cites·20 claims
- 0370US4935541APreparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic anhydrideOCCIDENTAL CHEM CO·Filed 1989·Granted Jun 19, 1990·9 cites·11 claims
- 0469US5773668AMethod of making trichloromethoxybenzeneOCCIDENTAL CHEM CO·Filed 1997·Granted Jun 30, 1998·12 cites·21 claims
- 0567US5233082AMethod of making 3-hydroxy-2,4,5-trifluorobenzoic acidOCCIDENTAL CHEM CO·Filed 1982·Granted Aug 3, 1993·8 cites·20 claims
- 0666US5380926AMethod of making 3-methoxy-2,4,5-trifluorobenzoic acidOCCIDENTAL CHEM CO·Filed 1994·Granted Jan 10, 1995·9 cites·20 claims
- 0764US4981999ASelective removal of chlorine from chlorophthalic compoundsOCCIDENTAL CHEM CO·Filed 1989·Granted Jan 1, 1991·7 cites·22 claims
- 0852US5233085APreparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic acidOCCIDENTAL CHEM CO·Filed 1992·Granted Aug 3, 1993·4 cites·4 claims
- 0949US6118028AMethod of making trifluoromethoxybenzenesOCCIDENTAL CHEM CO·Filed 1998·Granted Sep 12, 2000·4 cites·21 claims
- 1043US5596104APreparation of 3,4,6-trifluorophthalic acidOCCIDENTAL CHEM CO·Filed 1993·Granted Jan 21, 1997·2 cites·21 claims
- 1142US6201152B1Method of making 3,5-dichloro-p-toluoyl chlorideOCCIDENTAL CHEM CO·Filed 1999·Granted Mar 13, 2001·2 cites·16 claims
- 1237US5294738AProcess for selective hydrodefluorinationOCCIDENTAL CHEM CO·Filed 1992·Granted Mar 15, 1994·1 cites·22 claims
- 1334US6284934B1Reducing meta content of isomeric mixtures of halo substituted alkylbenzenesOCCIDENTAL CHEM CO·Filed 2000·Granted Sep 4, 2001·0 cites·21 claims
- 1434US6117278AMethod of making α-chloroxylenesOCCIDENTAL CHEM CO·Filed 1998·Granted Sep 12, 2000·1 cites·20 claims
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