What is Patents: A patent is grant of exclusive rights for an invention to make, use and sell the invention for a limited period of 20 years. The patent grant excludes others from making, using, or selling the invention. Patent protection does not start until the actual grant of a patent. Patentable invention: In order to be patentable an invention should have the following characteristics: The invention should be process or product The invention should be novel or new It involves an inventive step It is capable