From this on the Miami U.(Ohio) web site .. Sigma Kappa was there from at least 1992 thru 2001
http://www.units.muohio.edu/saf/gra/...spring2001.pdf
and per the all Sigma Kappa chapters ever thread ..
Alpha Iota (1922-2001) - Miami University (Ohio)
which is (now that I look closely) in the list above
It looks like Delta Phi Epsilon is the 3rd NPC never chartered at Miami