"My memory seems to believe there are some countries which will not let you claim priority from a US provisional patent application unless the US provisional application contains claims; if there are no claims, you cannot claim priorityIt seems to this Kat that this is an ideal question to put before this weblog's collectively wise and knowledgeable readership. Can you help?
Is my memory correct? [That's not the question -- but this is:] What countries require claims in the provisional in order for you to claim the benefit of it?".