Feudalism was all about exchange between different estates in an ordered society; I'd be amazed if something like that has ever existed in the area covered by the U.S.A. Of course the word feudal is misused almost as much as the word fascist.
A message Simfan asked me to pass along: The Hudson valley during the patroonage era was literally feudalist.
Very much so. My best friend lives near where the Anti-Rent War went down after Stephen Van Rensselaer III died. People still have it very firmly in mind over there.