Inventor
HAUFFE DIETER
DE11 patents
⚠️ This page may combine multiple inventors who share the name “HAUFFE DIETER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
METALLGESELLSCHAFT AG
9 patentsUS5294266AMar 15, 1994
Process for a passivating postrinsing of conversion layers
METALLGESELLSCHAFT AG53 citations95
US5165795ANov 24, 1992
Method of determining the weight of conversion layers per unit of area
METALLGESELLSCHAFT AG8 citations72
US5383982AJan 24, 1995
Process of producing phosphate coatings
METALLGESELLSCHAFT AG10 citations70
US5203930AApr 20, 1993
Process of forming phosphate coatings on metal surfaces
METALLGESELLSCHAFT AG15 citations70
US4849031AJul 18, 1989
Process of producing phosphate coatings on metal surfaces
METALLGESELLSCHAFT AG13 citations70
US4597806AJul 1, 1986
Process for maintaining the zinc content in zinc phosphate baths
METALLGESELLSCHAFT AG2 citations61
US4897128AJan 30, 1990
Process of determining the zinc content of phosphating baths
METALLGESELLSCHAFT AG5 citations56
US4867853ASep 19, 1989
Process of producing phosphate coatings
METALLGESELLSCHAFT AG5 citations56
US5039361AAug 13, 1991
Process of phosphating metal surfaces
METALLGESELLSCHAFT AG6 citations55