Hello. I have recently learned that most (not all) movie posters that were published before 1960 are now in public domain, meaning they are not copyrighted anymore and can be used for commercial purposes. Now, I'd like to print some of these posters on t-shirts and have them sold online. What I figured out is that even if the poster itself is not copyrighted anymore, the rights to the movie (name of the movie, character likeness etc.) might still belong to someone or some company. My question: could I still get in legal trouble selling such t-shirts online even if the poster itself is not copyrighted?
Saulevas, in what country do you reside? It will be under your country's laws that you will be sued if you infringe on a rights-holder's rights.
What you have learned about copyrights in movie posters is correct as far as it goes. Many of the posters published before 1963 are now in the public domain - but many others had their copyrights renewed.
In addition, many of the posters that are in the public domain now have new copyrights that must be considered. For example, if a poster was originally printed in black-and-white, a new copyright could have been registered on a colorized-version of the poster. While the black-and-white poster that is in the public domain could be used without a copyright problem, to use the colorized version would require permission from the new copyright holder.
So, you would need to know the current status of the copyright in the poster before proceeding with your plans for creating tee-shirts.
Copyrights are not all that need to be considered, however, when considering using public domain works in a commercial manner. There are also estate rights/publicity rights that can exist as well as trademark rights. For example, images of Charlie Chaplin are rights-protected and Disney images are rights-protected (or, if used, can result in a lawsuit).
An investigation into the rights that may still remain in the work must be done prior to use to keep your business as lawsuit-free as any business can possibly be.
What Zigner said, in other words, is what I am saying, but I used more words. Yes, you can "get in legal trouble" if your search for all existing rights in the posters you intend to use is not a thorough one. Consulting with an IP attorney in your area prior to printing and selling your tee shirts can be a smart investment. Nothing can put an end to a beginning commercial venture quite like a costly lawsuit.
Good luck.