Roster of Union Soldiers, 1861-1865, shows
Salveson, Seven PA 55th Inf.
Salveson, Seven PA 97th Inf. Co.I
Salveson, Hans WI 10th Inf. Co.K
With all the information you have, I would suggest contacting one of the following three:
NARA, Washington, DC
Broadfoot Publishing Co http://www.broadfootpublishing.com
Broadfoot provides the same information as NARA; the cost is a few dollars more, the turn around usually less than one week
Alan Pitts cssoldier@hotmail.com
He provides a similar service and will discuss costs.