Difference between patent and patent pending?

Answer:
A patent is a grant from a patent office, such as the United States Patent Office. "Patent Pending" is a phrase that an application for a patent has been filed and is in some stage in the process of obtaining a patent. Thus, a patent can be presently enforced while a patent that is merely pending is unenforceable but can mature into a patent that can be enforced. Once the pending patent matures, the patent owner can sue for back damages or reasonable royalties starting from the filing date of the patent.
First answer by Doramjan. Last edit by Doramjan. Contributor trust: 4 [recommend contributor recommended]. Question popularity: 1 [recommend question].