That's not even copyright, that's Trademarks and maybe registered design patents. If I draw fan art of Mickey Mouse, it's copyright me, not Disney. If I sell i

That's not even copyright, that's Trademarks and maybe registered design patents. If I draw fan art of Mickey Mouse, it's copyright me, not Disney. If I sell it or use it for promoting something, then it's probably a violation of Disney's trademarks - trademarks are there to make sure you don't think something was made by one entity when it was actually made by another. Trademarks don't expire after 50 or 80 years or whatever. They exist as long as the holder continues to assert them.