Part 3 describes the best uses for provisional patent applications. Specific business interests and preventing statutory bars to receiving a patent are the key reasons to seek a provisional patent application.
provisional
The Problem With Provisionals: Part 2
Part 2 details the common pitfalls with provisional patent applications. If an inventor makes a mistake, it could cost them the rights to their patent.
The Problem With Provisionals: Part 1
Part 1 describes the rights provided by provisional patent applications. Basically, a provisional patent application is purchasing the right to stand in line.