In reference to the patent: US 5,858,064
I think this patent has expired based on the priority date of August 22, 1995. Is that correct?
Yes, that is correct. This patent expired on August 22, 2015. The earliest document in the claims of domestic benefit is Serial Number 518,020, with a filing date of August 22, 1995:
Continuation of Ser. No. 822,141, Mar. 17, 1997, Pat. No. 5,766,308, which is a continuation of Ser. No. 518,020, Aug. 22, 1995, Pat. No. 5,611,845.