what is PCT patents
The Patent Cooperation Treaty (PCT) is an international patent law treaty, concluded in 1970. It provides a unified procedure for filing patent applications to protect inventions in each of its contracting states.A patent application filed under the PCT is called an international application, or PCT application. PCT application does not itself result in the grant of a patent, since there is no such thing as an international patent, and the grant of patent is a prerogative of each national or regional authority.