While working as a researcher at Humboldt University of Berlin, Speter developed methods for extracting Thorium and Scandium. In 1911 and 1912 he registered patents on these methods. In the same years he operated a laboratory for producing Tungsten paste, then used in the manufacture of Incandescent light bulb filaments. In 1923 and 1925 he registered patents for a disinfecting lamp based on acetaldehyde. In 1927 and 1928 he studied the electrostatic properties of silk, plastic materials and synthetic textiles. The results of these studies were published in a series of articles in several professional journals.