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| 1929 1934 1938 1963 1991 1995 | Foundation in Berlin as engineering company and national daughter of the Silica Gel Corporation of Baltimore Take over of the Silica Gel Gesellschaft by the German Management Acquisition of the industrial site and own manufacture of apparatuses for adsorption units in Berlin-Spandau Sale of the factory for production of adsorbent in Bad Homburg to the Grace GmbH Spin-off of the Silica Verfahrenstechnik as subsidiary company from Silica Gel GmbH with financial participation of the Berndorf AG Österreich Moving of the company to the new location in Berlin-Reinickendorf |
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