It was developed and refined by a single man, Swiss engineer Robert Durrer, and commercialized by two small steel companies in allied-occupied Austria, which had not yet recovered from the destruction of World War II.
Proses ini dikembangkan dan disempurnakan oleh satu orang, insinyur Swiss Robert Durrer, dan dikomersialkan oleh dua perusahaan baja di sekutu yang diduduki Austria, yang belum pulih dari kehancuran Perang Dunia II.