Not sure if any help Franek but searching using the military name format - Schloss, Sigmund Benjamin - gives a few instant results on Ancestry.com and also Fold 3.
A 1940 Census listing somebody of that name in Salt Lake City,Utah - on Ancestry.com
and also a Passport application by somebody of that name comes up on Fold 3.
I do not have an account with Ancestry therefore I cannot see all the details,but there are also other documents under that name as well.
rgds LR