Marcel Feld
28Patents
7h-index
18Co-inventors
66Inventor score
Filing activity: Dec 23, 1974 → Sep 25, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6613934B1 | Enantiomerically enriched malonic acid monoesters substituted by a tertiary hydrocarbon radical, and their preparation | Chemistry; Metallurgy | 57 | Expired |
| US6121466A | Process for the preparation of macrocyclic esters | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4603220A | Process for the preparation of aromatic monocarboxylic acids from toluene and substituted toluenes | Chemistry; Metallurgy | 23 | Expired |
| US5717111A | Process for the continuous preparation of macrocyclic compounds | Chemistry; Metallurgy | 12 | Expired |
| US4490297A | Method for the recovery and reuse of cobalt and/or manganese components of catalysts | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5629455A | Process for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkylfurans | Chemistry; Metallurgy | 8 | Expired |
| US4490298A | Method of isolating cobalt and/or manganese as oxalates | Chemistry; Metallurgy | 8 | Expired |
| US4488999A | Method for the recovery of cobalt oxalate and/or manganese oxalate | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4605757A | Method of preparing halogen benzoic acids from toluenes halogenated in the nucleus | Chemistry; Metallurgy | 7 | Expired |
| US6156214A | Process for removing mercury from alkali metal alkoxide solutions | Chemistry; Metallurgy | 5 | Expired |
| US4764638A | Method for the preparation of 2,6-naphthalene dicarboxylic acid | Chemistry; Metallurgy | 5 | Expired |
| US4007223A | Method of preparing p-nitrobenzoic acid | Chemistry; Metallurgy | 4 | Expired |
| US6172257A | Process for preparing potassium monoethyl malonate | Chemistry; Metallurgy | 2 | Expired |
| US5831119A | Process for the preparation of aminoacetic acids with a tertiary hydrocarbon radical in the .alpha.-position, or their nitriles | Chemistry; Metallurgy | 2 | Expired |
| US5274093A | Process for the preparation of sodium thiobarbiturate | Chemistry; Metallurgy | 1 | Expired |
| US6399809B1 | Process for the preparation of amino acid derivatives | Chemistry; Metallurgy | 1 | Expired |
| US5569781A | Process for the preparation of 1-aminocyclopropanecarboxylic acid hydrochloride | Chemistry; Metallurgy | 1 | Expired |
| US5616723A | Process for the preparation of 3-amino-5-methylpyrazole | Chemistry; Metallurgy | 1 | Expired |
| US5861533A | Process for nitrosation of C-H-acidic compounds | Chemistry; Metallurgy | 1 | Expired |
| US5767326A | Process for preparing hydroxymethylcyclopropane | Chemistry; Metallurgy | 1 | Expired |
| US6107522A | Process for the preparation of cyclopropylamine | Chemistry; Metallurgy | 0 | Expired |
| US5481019A | Process for the preparation of alkali metal salts of cyanoacetone | Chemistry; Metallurgy | 0 | Expired |
| US6143920A | Process for the preparation of methoxyacetic acid esters | Chemistry; Metallurgy | 0 | Expired |
| US6580004B1 | Process for preparing potassium monoethyl malonate | Chemistry; Metallurgy | 0 | Expired |
| US6730804B1 | Process for preparing cyclopropanecarboxylates of lower alcohols | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.