Inventor
KARCH JOHN A
21 patents
⚠️ This page may combine multiple inventors who share the name “KARCH JOHN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ATLANTIC RICHFIELD CO
15 patentsUS4522937AJun 11, 1985
Preparative process for alkaline earth metal, aluminum-containing spinels
ATLANTIC RICHFIELD CO44 citations89
US4158548AJun 19, 1979
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO24 citations82
US4097244AJun 27, 1978
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO21 citations82
US4163709AAug 7, 1979
Catalyst demetallization by oxidation in a defined temperature range
ATLANTIC RICHFIELD CO17 citations81
US4101444AJul 18, 1978
Catalyst demetallization utilizing a combination of reductive and oxidative washes
ATLANTIC RICHFIELD CO17 citations81
US4317713AMar 2, 1982
In situ aluminum passivation process
ATLANTIC RICHFIELD CO16 citations74
US4105416AAug 8, 1978
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO17 citations74
US4267032AMay 12, 1981
Demetallization process for a conversion catalyst
ATLANTIC RICHFIELD CO8 citations73
US4243550AJan 6, 1981
Catalyst demetallization with a reductive SO2 wash
ATLANTIC RICHFIELD CO16 citations73
US4234452ANov 18, 1980
High pressure oxygen aqueous phase catalyst demetallization
ATLANTIC RICHFIELD CO7 citations73
US4224038ASep 23, 1980
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO10 citations73
US4163710AAug 7, 1979
Cracking process employing a combination of reductive and oxidative washes
ATLANTIC RICHFIELD CO9 citations73
US4102811AJul 25, 1978
Catalyst demetallization by oxidation in a defined temperature range
ATLANTIC RICHFIELD CO7 citations73
US4197090AApr 8, 1980
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO6 citations72
US4204840AMay 27, 1980
Process for removing sulfur from coal
ATLANTIC RICHFIELD CO2 citations61