Inventor
KLOPFER HOWARD J
8 patents
Patents
8 patentsUS3998840ADec 21, 1976
Method for making polyetherimides using a sodium chloride or ferric sulfate catalyst
GEN ELECTRIC35 citations91
US4293683AOct 6, 1981
Method for making polyetherimides using carboxylic acid salts of alkali metals or zinc as catalysts
GEN ELECTRIC14 citations73
US4565858AJan 21, 1986
Polyetherimides with high thermal stability and solvent resistance and precursors therefor
GEN ELECTRIC17 citations71
US4049721ASep 20, 1977
Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene
GEN ELECTRIC12 citations70
US4105857AAug 8, 1978
Process for preparing phenyl trichloro-ethanes
GEN ELECTRIC3 citations62
US4460800AJul 17, 1984
Process for preparation of hydroxyaryldialkylcarbinols
GEN ELECTRIC3 citations61
US4460798AJul 17, 1984
Process for preparation of asymmetrical bisphenols
GEN ELECTRIC5 citations61
US4128731ADec 5, 1978
Preparation of 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane
GEN ELECTRIC1 citations51