Inventor
SUN KWOK K
US13 patents
⚠️ This page may combine multiple inventors who share the name “SUN KWOK K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UPJOHN CO
8 patentsUS4052466AOct 4, 1977
Process for the preparation of bisphenol-a
UPJOHN CO28 citations81
US4008275AFeb 15, 1977
Process for isolating 4,4'-diaminodiphenylmethane
UPJOHN CO7 citations72
US4201722AMay 6, 1980
Process for separating 4,4'-diaminodiphenylmethane
UPJOHN CO3 citations61
US4177211ADec 4, 1979
Process for the preparation of bis(aminophenyl)alkanes
UPJOHN CO4 citations61
US4034039AJul 5, 1977
Purification of methylenedianilines
UPJOHN CO6 citations61
US4029705AJun 14, 1977
Purification process for MDA
UPJOHN CO2 citations61
US4351957ASep 28, 1982
Process for preparing diaminodiphenyl-alkanes
UPJOHN CO1 citations51
US4028361AJun 7, 1977
Process for the purification of MDA
UPJOHN CO0 citations51