Can I patent a process?
One of the things you can patent is a process. A process is some
method for making or doing something. For example, if you invent a way to
apply some chemical to wood which ends up making the wood stronger, that
process could be patented, assuming it meets the other patent requirements. It is also
possible to get a patent for a new use of a known process. For example, if
you figure out a way to use dishwashing fluid as a skin conditioner, you could
obtain a patent on that process (although not on the underlying dishwasher
fluid/conditioner, since that was already a public thing).