236 - Alfred KRUPP (1812 - 1887) (2) 
KRUPP had filed a first patent application on 6 August 1877 for a « Nouveau mode de fabrication de la fonte purifiée, de l’acier de fer ou produits analogues en grande masse » (No 195). By May 1879 the application was still being processed by the Government.
In the meantime KRUPP had filed 3 patents of addition in Germany relating to the process covered by the initial patent application. 
He decided to extend the patent coverage of these improvement to Luxembourg and on 7 May 1879 KRUPP filed a demande de brevet de perfectionnement (Zusatzpatent) for the earlier Luxembourg application, presumably incorporating the subject-matter of the three German Zusatzpatente.
The new application carried the title of:
Verbesserungen und ___ des Verfahrens zur Reinigung des Roheisens
The new application was merged into the first pending application and a combined, single patent was issued on 17 August 1880 under the new Patent Law. 
 FamilySearch database
 Köhne-Lindenlaub, Renate, "Krupp, Alfred" in: Neue Deutsche Biographie 13 (1982), S. 130-35
 DE Reichspatente No 8,184, No 8,185 and No 10,680.
 LU patent No 50