Going to be very, very difficult to find a pattern name as Federal made several thousand patterns & even Replacements doesn't bother listing anything other than the Depression patterns. I live 8-9 miles from the old plant site that closed in 1979 & Federal was a mass production (as in 10s of millions upon 10s of millions) pieces of utilitarian ware. Yours are probably at best made in the 60s when this crinkle type pattern was popular & unfortunately absolutely no one to the best of my knowledge has created any type of database for Federal pattern information past the Depression era.