Here is a page from the US Patent Office on their filing fees....I don't see any real expensive fees here. <a href="http://www.uspto.gov/web/offices/ac/qs/ope/fee2007september30_2008july01.htm" target="_blank">http://www.uspto.gov/web/offices/ac/qs/ope/fee2007september30_2008july01.htm</a> Might be different overseas.....maybe.