alhoon wrote:So, I can go out and reprint and sell Lovecraft work, or make movies out of his books without giving a penny to his family?
Specifically the stuff that H. P. Lovecraft did himself, yes. Anything that derives from later authors, you'll need to look at their death dates.
Note that Chaosium owns a trademark in the phrase "Call of Cthulhu" as used in games. Some game companies have gotten around this by naming their games something else, like "Arkham Horror", and then referring to "Cthulhu" (not "Call of Cthulhu") in small print.
alhoon wrote:And in order to make a new movie of say Harry Potter or Star Wars without paying the original creator you have to wait 95 years till their creation? Ouch.
Movies may be held by a corporation or by a human author. I think Star Wars and Harry Potter may be held be Lucas and Rowling respectively rather than a company. In any case, the Harry Potter movies are merely derivative works from the novels, and so it's likely they'll be included under the original novel's copyright, which would be 70 years after Rowling dies.
Note also that Rowling has been very supportive of fan fiction made using her Harry Potter characters. It's possible that she'd be okay with somebody making derivative works (such as a fan-made movie) of them. George Lucas, on the other hand, has been famously opposed to fan-made content featuring the Star Wars plots and characters. He has even threatened a lawsuit against a parody film (which would normally be protected under First Amendment laws) - the case never went to court because the parody maker decided to comply instead of face a lawsuit.
Anyhow, this is probably way off topic for this thread. I like to help people understand intellectual property law. Feel free to start a separate thread if you have any further questions!