Joan K. Duffy, age 74, of Woodridge.  Beloved wife of the late John.  Loving mother of Jill (Steve Young).  Dear sister of the late George Formanek.  Services and interment at Clarendon Hills Cemetery will be private.  Memorials in Joan’s memory to the American Heart Association would be appreciated.  Hallowell & James Funeral Home assisting the family 630-964-6500