No Such Thing as a Provisional Patent
Not to be too nit-picky but there is no such thing as a provisional patent; there is only a provisional patent application (PPA). When you file a PPA, it holds your place in line at the USPTO and allows you to claim patent pending status for a year. If you don't file a regular patent application within a year, the PPA has no value. Nolo offers PPA articles, books, and an online PPA filing program.