Typically, felonies in Utah can be expunged after 7 years from the time probation ends. Your charge should qualify as a typical felony. There are also other requirements, such as:
- not having 2 or more felony convictions from separate events
- not having 3 or more crimes, 2 of which are class A misdemeanors
- not having 4 or more crimes, 3 of which are class B misdemeanors
Because your conviction date was in 2005, your probation probably did not end until sometime after 2005. Seven years after your probation ended you should be eligible for an expungement.
For the process of how to obtain an expungement and other requirements, visit: http://www.utcourts.gov/howto/expunge/.