I've had an idea for a service for about 4 years and now I want to get a patent, but I've found someone else already patented the exact same idea in July 2007 down to every last detail. I have no way of proving that I invented it first because I never patented it. However, the one difference between his idea and mine is that he plans to charge a fee to each customer using the service as his means for generating profits. In my idea, I have devised a process that would allow me to offer the service for free to all customers, and rather generate my profits in another way. I obviously cannot tell my method, but it is 100% legal, and I wanted to know if I could patent at least this alternative business process for the same service, and thus provide the same service, but offer it for free?