After his death the factory is continued by his widow under the name Johann Loetz Witwe, to be taken over by her grandson Maximilian von Spaun in 1879, who was in charge until 1908.
From 1900 famous designers were approached like Leopold Bauer, Adolph Beckert, Joseph Hofmann, Maria Kirschner, Koloman Moser and Franz Hofstötter who were responsable for the fabrication of vases in Art Nouveau and Art Deco style, in the highest level ,as well as designs for the Wiener Werkstätte.
The factory was active untill 1931.
