Help talk:Copyright Tutorial
From Embryology
USA Copyright
Because of legislation passed in 1998, no new works will fall into the public domain until 2019, when works published in 1923 will expire. In 2020, works published in 1924 will expire, and so on. For works published after 1977, if the work was written by a single author, the copyright will not expire until 70 years after the author’s death. If a work was written by several authors and published after 1977, it will not expire until 70 years after the last surviving author dies.
http://fairuse.stanford.edu/Copyright_and_Fair_Use_Overview/chapter8/8-a.html
