List of films in the public domain in the United States
Copyrightable elements of a film
There is no official list of films (or other works) in the public domain. It is difficult to determine the public domain status of a film because it can incorporate any or all of the following copyrightable elements:
Copyrightable elements of a film
Film copyright involves the copyright status of multiple elements that make up the film. A film can lose its copyright in some of those elements while retaining copyright in other elements. Experts in the field of public domain sometimes differ in their opinions as to whether a particular film is in the public domain.
Copyrightable elements of a film
The use of music in a film can cause uncertainty with regard to copyright. As of 2010, it is not known whether the use of music in a film constitutes publication of the music for the purpose of copyright. Unpublished works are treated differently from published works under US copyright law.