The term of a patent is twenty years according to the Indian Patent Act. It starts from the date of filing in case of domestically filed patents. The validity of a patent for national phase applications is twenty years from the date of International filing. In some countries, you can adjust this validity period if the patent office delays in granting a patent. This is also true for a delay from regulatory bodies in case of pharmaceutical and agricultural patents. However, the Indian patent office doesn’t entertain an extension of patent validity. After the expiry of a patent, it cannot be renewed.
To know more, read What are the Important Elements of Patent Prosecution in India?
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