Federal Reserve Act - Remedy video.

[David Merrill]

See this link: http://moneyfactory.gov/usnotes.html

"Both types of notes were redeemable in gold until 1933, when the United States abandoned the gold standard. Since then, both currencies have served essentially the same purpose, and have had the same value. Because United States Notes serve no function that is not already adequately served by Federal Reserve Notes, their issuance was discontinued, and none have been placed into circulation since January 21, 1971."

Yes. But the ones that are still extant are kept in circulation - with the major 12 Fed Banks.