Copyright Policy and Resource Guide Public Domain
How do I determine if a work has entered the public domain?
Public Domain works are those that fall into any of the following three categories:
- Publications dated 1922 or earlier.
- Works that do not include a copyright notice and were first published before January 1, 1978.
- Most United States government documents.
Once a work has acquired public domain status it is no longer eligible for copyright protection. Use of material of this status is permissible without the copyright owner's permission.