I just read about this in the news.
It is an invention by Corning, sometime in the 1960's.
A type of glass that is very strong, flexible, hard to scratch = they call it gorilla glass.
I don't know what its composition is. I read that they temper it in a chemical bath which in contrast with Pyrex, pyrex is tempered with heat treatment.
It didn't become a big success back in the 1960's and it mostly stood dormant in Corning's database.
Now with cellphones, LCD screens and specially borderless TVs, some other inventions they don't want to mention, it is going to claw its way back into the limelight.
http://www.corning.com/gorillaglass/gorilla_timeline.aspxhttp://finance.yahoo.com/news/1962-glass-could-be-Cornings-apf-978849301.html?x=0 (but yahoo might delete it tomorrow)