Hi Pip, not sure if you're still looking for other info, but I have a Fold3 membership (use skill level not real high though). Took a quick look and found a shipping manifest when he sailed to Europe for the war.
Patterson, Fred M. 1167450
SGT 113FA (Field Artillery as Brian explained)
Father: John K Patterson, 75 N. Union Street, Concord, NC
Shipped out from Hoboken, New Jersy aboard the ship "George Washington" on May 8, 1918 with a whole lot of othr NC boys.
I'll look further but this is all I found in a quick search. Like I said, my Fold3 searching skills aren't quite up to snuff.