Inventor

PIETZKA GERHARD

4 patents

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

BERGWERKSVERBAND GMBH

2 patents

US4219405AAug 26, 1980

Method of continuously producing coke

BERGWERKSVERBAND GMBH24 citations79

US4289604ASep 15, 1981

Method of producing an isotropic coke

BERGWERKSVERBAND GMBH11 citations70

SIGRI ELEKTROGRAPHIT GMBH

2 patents

US4111794ASep 5, 1978

Method of producing pitch coke

SIGRI ELEKTROGRAPHIT GMBH11 citations69

US4137150AJan 30, 1979

Method for the manufacture of a coal-tar pitch coke

SIGRI ELEKTROGRAPHIT GMBH6 citations58