四カ年計画
Throughout the 1930s the company underwent a process of Aryanization, and by 1938 Jewish employees had been dismissed and the Jews on the board had resigned. The remaining few left in 1938 after Hermann Göring issued a decree, as part of the Nazis' Four Year Plan (announced in 1936), that the German government would make foreign exchange available to German firms to fund construction or purchases overseas only if certain conditions were met, which included making sure the company employed no Jews.