1997. 01.23.1997. (Silanes)
2001. 03.05.2001. (Focus)
2008. 11.10.2008. Bus. Managers
2010. 09.01.2010. Uni. Illinois
2016. 01.21. Gelest ExSil(TM) 100
2019. 06.06. Launches
2019. 07.01. Acq. Bimax
2020. 04.30. Acq. By Mitsubishi Che
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