William Dubilier, who in 1909 invented the mica capacitor [11] and in 1925 patented a water-cooled electrolytic “condenser” [12], said during one of his presentations in 1948 the appropriate words about the problems with electrolytic capacitors [13]: “Up to 1925, one of the basic precautions taught to every condenser worker was to be always on guard against any risk of contamination of condenser materials by outside chemicals—alkalis or acids.