by gustav » Thu May 03, 2012 6:11 am
First, you cannot generally patent an "idea" -- it has to be applied to a specific "invention" that you claim.
Second, patent rights are generally only national in scope (other than, perhaps, EU patents). You would need to file an application and comply with fees and translations for each and every country where you wanted to prevent others from making, using or selling your invention.
You can quickly and easily reserve your rights to file a "patent application" within a year by filing a "provisional" application for $125. This allows you to fully disclose your invention in a secret document that is in possession of the US Patent Office, in case you later file a patent claiming that invention. You can discuss your invention (confidentially) with potential investors, etc, knowing that you have "patent pending" on it.