Inventor
WIEGAND KARL E
18 patents
⚠️ This page may combine multiple inventors who share the name “WIEGAND KARL E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ETHYL CORP
15 patentsUS4595742AJun 17, 1986
Di(alkylthio)diamine chain extenders for polyurethane elastomers
ETHYL CORP49 citations92
US5183061AFeb 2, 1993
Silicon compounds in bone treatment
ETHYL CORP6 citations73
US4917045AApr 17, 1990
Silicon compounds in poultry hatching
ETHYL CORP14 citations73
US4870191ASep 26, 1989
Silicon containing reaction product
ETHYL CORP7 citations73
US4070394AJan 24, 1978
Carnitine nitrile halide preparation
ETHYL CORP9 citations73
US5252345AOct 12, 1993
Zeolite compositions
ETHYL CORP14 citations72
US4187230AFeb 5, 1980
Preparation of 5-aroyl-pyrrole compounds
ETHYL CORP7 citations72
US4374256AFeb 15, 1983
Process for the preparation of pyrryl-2-acetonitrile
ETHYL CORP2 citations62
US4008271AFeb 15, 1977
Process for preparing a mixed anhydride of a sulfonic acid and a carboxylic acid
ETHYL CORP3 citations62
US3965168AJun 22, 1976
3-Carbamoyl-3-hydroxyglutaric acid and salts
ETHYL CORP3 citations62
US3960941AJun 1, 1976
3-Hydroxy-3,4-dicarbamoylbutyric acid and salts
ETHYL CORP2 citations62
US4113771ASep 12, 1978
Process for the purification of citric acid
ETHYL CORP5 citations56
US3962287AJun 8, 1976
Chemical process for producing citric acid
ETHYL CORP1 citations51
US3935216AJan 27, 1976
Preparation of toluoyl-5-pyrryl-2-acetonitrile
ETHYL CORP0 citations51
US4066688AJan 3, 1978
Chemical process
ETHYL CORP0 citations46