| 1890 | Foundation of C. Dorn GmbH originally as bronze powder factory | 
| 1907 | C. Dorn purchases Trautenfurt | 
| 1954 | Production of copper powders by electrolysis in Trautenfurt | 
| 1991 | Eckart-Werke purchase C. Dorn GmbH | 
| 2000 | New production facilities in three-floor-technique | 
| 2001 | ECKA Granulate Velden GmbH | 
| 2004 | Rebuilt new silver coating and water cleaning equipment | 
| 2005 | Implementation of production of dendritic copper powders from MicroMet (former Norddeutsche Affinerie) | 
| 2006 | New filling and packing station set up  | 
| 2008 | New screening and milling line | 
| 2010 | Takeover by GGP Metalpowder AG | 

