Inventor · disambiguated record
Marcel Feld
Also filed as: FELD MARCEL
28 granted patents·253 citations·filing 1974–2000
96Inventor score
Top patents by PatentIndex Score
28 records- 0188US6613934B1Enantiomerically enriched malonic acid monoesters substituted by a tertiary hydrocarbon radical, and their preparationDEGUSSA·Filed 1997·Granted Sep 2, 2003·65 cites·23 claims
- 0288US4603220AProcess for the preparation of aromatic monocarboxylic acids from toluene and substituted toluenesDYNAMIT NOBEL AG·Filed 1984·Granted Jul 29, 1986·24 cites·14 claims
- 0379US6121466AProcess for the preparation of macrocyclic estersHUELS CHEMISCHE WERKE AG·Filed 1999·Granted Sep 19, 2000·38 cites·20 claims
- 0479US4490297AMethod for the recovery and reuse of cobalt and/or manganese components of catalystsDYNAMIT NOBEL AG·Filed 1982·Granted Dec 25, 1984·20 cites·14 claims
- 0575US4488999AMethod for the recovery of cobalt oxalate and/or manganese oxalateDYNAMIT NOBEL AG·Filed 1983·Granted Dec 18, 1984·11 cites·4 claims
- 0675US4007223AMethod of preparing p-nitrobenzoic acidDYNAMIT NOBEL AG·Filed 1974·Granted Feb 8, 1977·9 cites·17 claims
- 0773US4605757AMethod of preparing halogen benzoic acids from toluenes halogenated in the nucleusDYNAMIT NOBEL AG·Filed 1984·Granted Aug 12, 1986·10 cites·10 claims
- 0873US4490298AMethod of isolating cobalt and/or manganese as oxalatesDYNAMIT NOBEL AG·Filed 1983·Granted Dec 25, 1984·10 cites·14 claims
- 0971US5717111AProcess for the continuous preparation of macrocyclic compoundsHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Feb 10, 1998·15 cites·13 claims
- 1065US5629455AProcess for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkylfuransHUELS CHEMISCHE WERKE AG·Filed 1996·Granted May 13, 1997·11 cites·7 claims
- 1162US6156214AProcess for removing mercury from alkali metal alkoxide solutionsHUELS CHEMISCHE WERKE AG·Filed 1998·Granted Dec 5, 2000·10 cites·18 claims
- 1261US4764638AMethod for the preparation of 2,6-naphthalene dicarboxylic acidDYNAMIT NOBEL AG·Filed 1986·Granted Aug 16, 1988·6 cites·22 claims
- 1358US6399809B1Process for the preparation of amino acid derivativesDEGUSSA·Filed 2000·Granted Jun 4, 2002·2 cites·16 claims
- 1457US5569781AProcess for the preparation of 1-aminocyclopropanecarboxylic acid hydrochlorideHUELS CHEMISCHE WERKE AG·Filed 1995·Granted Oct 29, 1996·6 cites·8 claims
- 1551US5831119AProcess for the preparation of aminoacetic acids with a tertiary hydrocarbon radical in the α-position, or their nitrilesHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Nov 3, 1998·4 cites·17 claims
- 1649US5274093AProcess for the preparation of sodium thiobarbiturateHUELS CHEMISCHE WERKE AG·Filed 1992·Granted Dec 28, 1993·3 cites·3 claims
- 1744US6172257B1Process for preparing potassium monoethyl malonateCREANOVA SPEZIALCHEMIE GMBH·Filed 1999·Granted Jan 9, 2001·3 cites·11 claims
- 1840US6580004B1Process for preparing potassium monoethyl malonateDEGUSSA·Filed 2000·Granted Jun 17, 2003·0 cites·20 claims
- 1939US5616723AProcess for the preparation of 3-amino-5-methylpyrazoleHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Apr 1, 1997·2 cites·8 claims
- 2038US6107522AProcess for the preparation of cyclopropylamineDEGUSSA·Filed 1999·Granted Aug 22, 2000·1 cites·13 claims
- 2138US5767326AProcess for preparing hydroxymethylcyclopropaneHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Jun 16, 1998·1 cites·13 claims
- 2237US5412146AProcess for the preparation of 2-cyanoacetoxypropionic estersHUELS CHEMISCHE WERKE AG·Filed 1994·Granted May 2, 1995·1 cites·14 claims
- 2336US5861533AProcess for nitrosation of C-H-acidic compoundsHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Jan 19, 1999·1 cites·18 claims
- 2432US6730804B1Process for preparing cyclopropanecarboxylates of lower alcoholsDEGUSSA·Filed 1998·Granted May 4, 2004·0 cites·19 claims
- 2532US6143920AProcess for the preparation of methoxyacetic acid estersHUELS CHEMISCHE WERKE AG·Filed 1998·Granted Nov 7, 2000·0 cites·17 claims
- 2629US5847197AProcess for the preparation of aminomalonic acid ester saltsHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Dec 8, 1998·0 cites·10 claims
- 2727US5481019AProcess for the preparation of alkali metal salts of cyanoacetoneHUELS CHEMISCHE WERKE AG·Filed 1994·Granted Jan 2, 1996·0 cites·15 claims
- 2823US5097030AProcess for the preparation of 2-(methylthio)barbituric acidHUELS CHEMISCHE WERKE AG·Filed 1990·Granted Mar 17, 1992·0 cites·2 claims
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