Trump tweets "COVFEFE" on 05/31/2017

COVFEFE is the empirical formula for Iron Cobalt Vanadium - an alloy invented in 1971 by Carl P. Stroble

This alloy is know as Vanadium Permendur

This alloy has military applications - specifically used to strengthen steel used for military aircraft

Vanadium Permedur is used in aircraft generators in Air Force transports, Army helicopters and Navy fighters

Wall Street Journal published an article on 12/27/2018 with headline "Vanadium is used to strengthen steel and China can't get enough of it"

The current patent for Iron Cobalt Vanadium alloy is held by Allegheny Ludlum Corp and Pittsburgh National Bank

The patent expires today: 4/10/20