How long does a patent last in india?

In India, the term of a patent is generally 20 years from the date on which the application is filed with the Indian Patent Office. This period is applicable to all patents granted in India, and during this term, the patent holder enjoys exclusive rights to the invention, subject to the payment of annual renewal fees. However, if the patent application is filed under the Patent Cooperation Treaty (PCT), which allows for international patent protection, the term of the patent in India will be 20 years from the international filing date. This international filing date is the date when the PCT application is first submitted, and the Indian national phase application is treated as a continuation of the PCT filing. Regardless of the route taken, the patent term in India remains fixed at 20 years, but the starting point for calculating this period differs depending on the filing process.