Is the name inspired by the building in C&C Red Alert by any chance?

https://cnc.fandom.com/wiki/Chronosphere_(Red_Alert_3)

That’s my personal reference to the word, but searching around a bit, it seems that it was registered as a trademark by a medical company already in 1991, 5 years before Red Alert.

https://trademark.trademarkia.com/chronosphere-74147725.html