Ad Interim Copyright Law and Legal Definition
Ad interim copyright is a copyright obtainable under particular circumstances and enduring for a limited time. When a book or periodical is first published abroad in the English language, the author and copyright proprietor should deposit one complete copy of such foreign edition in the copyright office, not later than six months after its publication abroad. It should be attached with a request for the reservation of the copyright and a statement of the name and nationality of the author and copyright proprietor and of the date of publication. This secures to the author or proprietor an ad interim copyright having all the force and effect given to copyright by the Federal Copyright Law. It will also endure until the expiration of five years after the date of the first publication abroad.