Inventor

ZELD STEPHEN M

US3 patents

⚠️ This page may combine multiple inventors who share the name “ZELD STEPHEN M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ASHLAND INC

2 patents

US5649574AJul 22, 1997

Engine coolant removal and refill method and device

ASHLAND INC32 citations91

US5673733AOct 7, 1997

Engine coolant removal and refill method and device

ASHLAND INC12 citations72

BASF CORP

1 patent

US5511590AApr 30, 1996

Engine coolant removal and refill method and device

BASF CORP17 citations80