Inventor
FELD MARCEL
DE28 patents
⚠️ This page may combine multiple inventors who share the name “FELD MARCEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HUELS CHEMISCHE WERKE AG
15 patentsUS6121466ASep 19, 2000
Process for the preparation of macrocyclic esters
HUELS CHEMISCHE WERKE AG38 citations92
US5629455AMay 13, 1997
Process for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkylfurans
HUELS CHEMISCHE WERKE AG11 citations74
US5717111AFeb 10, 1998
Process for the continuous preparation of macrocyclic compounds
HUELS CHEMISCHE WERKE AG15 citations73
US6156214ADec 5, 2000
Process for removing mercury from alkali metal alkoxide solutions
HUELS CHEMISCHE WERKE AG10 citations68
US5831119ANov 3, 1998
Process for the preparation of aminoacetic acids with a tertiary hydrocarbon radical in the α-position, or their nitriles
HUELS CHEMISCHE WERKE AG4 citations62
US5569781AOct 29, 1996
Process for the preparation of 1-aminocyclopropanecarboxylic acid hydrochloride
HUELS CHEMISCHE WERKE AG6 citations62
US5274093ADec 28, 1993
Process for the preparation of sodium thiobarbiturate
HUELS CHEMISCHE WERKE AG3 citations62
US5616723AApr 1, 1997
Process for the preparation of 3-amino-5-methylpyrazole
HUELS CHEMISCHE WERKE AG2 citations59
US5861533AJan 19, 1999
Process for nitrosation of C-H-acidic compounds
HUELS CHEMISCHE WERKE AG1 citations52
US5847197ADec 8, 1998
Process for the preparation of aminomalonic acid ester salts
HUELS CHEMISCHE WERKE AG0 citations52
US5412146AMay 2, 1995
Process for the preparation of 2-cyanoacetoxypropionic esters
HUELS CHEMISCHE WERKE AG1 citations52
US6143920ANov 7, 2000
Process for the preparation of methoxyacetic acid esters
HUELS CHEMISCHE WERKE AG0 citations51
US5767326AJun 16, 1998
Process for preparing hydroxymethylcyclopropane
HUELS CHEMISCHE WERKE AG1 citations51
US5481019AJan 2, 1996
Process for the preparation of alkali metal salts of cyanoacetone
HUELS CHEMISCHE WERKE AG0 citations49
US5097030AMar 17, 1992
Process for the preparation of 2-(methylthio)barbituric acid
HUELS CHEMISCHE WERKE AG0 citations42
DYNAMIT NOBEL AG
7 patentsUS4603220AJul 29, 1986
Process for the preparation of aromatic monocarboxylic acids from toluene and substituted toluenes
DYNAMIT NOBEL AG24 citations82
US4490297ADec 25, 1984
Method for the recovery and reuse of cobalt and/or manganese components of catalysts
DYNAMIT NOBEL AG20 citations81
US4605757AAug 12, 1986
Method of preparing halogen benzoic acids from toluenes halogenated in the nucleus
DYNAMIT NOBEL AG10 citations73
US4490298ADec 25, 1984
Method of isolating cobalt and/or manganese as oxalates
DYNAMIT NOBEL AG10 citations73
US4488999ADec 18, 1984
Method for the recovery of cobalt oxalate and/or manganese oxalate
DYNAMIT NOBEL AG11 citations73
US4007223AFeb 8, 1977
Method of preparing p-nitrobenzoic acid
DYNAMIT NOBEL AG9 citations73
US4764638AAug 16, 1988
Method for the preparation of 2,6-naphthalene dicarboxylic acid
DYNAMIT NOBEL AG6 citations62
DEGUSSA
5 patentsUS6613934B1Sep 2, 2003
Enantiomerically enriched malonic acid monoesters substituted by a tertiary hydrocarbon radical, and their preparation
DEGUSSA65 citations92
US6399809B1Jun 4, 2002
Process for the preparation of amino acid derivatives
DEGUSSA2 citations62
US6730804B1May 4, 2004
Process for preparing cyclopropanecarboxylates of lower alcohols
DEGUSSA0 citations52
US6107522AAug 22, 2000
Process for the preparation of cyclopropylamine
DEGUSSA1 citations51
US6580004B1Jun 17, 2003
Process for preparing potassium monoethyl malonate
DEGUSSA0 citations49