The 13th Letter

The 13th Letter, directed by Otto Preminger, was originally registered for copyright by Twentieth Century-Fox Film Corp. on January 19, 1951, under registration number LP727. Under the laws governing works from the 1928–1963 era, the copyright remained valid for 28 years and required a renewal filing in the 28th year to avoid entering the public domain. A search of the Stanford Copyright Renewal Database and the Library of Congress records confirms that the copyright was successfully renewed by Twentieth Century-Fox Film Corp. on December 1, 1978, under renewal number RE0000010963 (referencing the original registration LP727). Because the renewal was filed correctly, the film is protected by copyright in the United States for 95 years from its original publication date. It is scheduled to enter the public domain on January 1, 2047.