Patent is an exclusive right granted for 20 years in exchange of complete discloser of the innovation. Different countries have their different patent laws. The main objective is comparatively evaluation of the patent term extensions granted in developed countries like US, Europe, etc and developing countries like India. Study the strategies used by these countries for extending the patent term. Study of patent laws and their amendments, different cases and conditions and thus analyse the facts and understand eligible conditions in which an extension can be granted. Extension of a patent term is to compensate the regulatory delay which occurs during the approval process of marketing authorisation for the patent, due to which the patentee is unable to enjoy the monopoly. Thus patent term extension encourages innovators to invest in the researches and bring out innovations. Here comparitive evaluation of patent term extension between developed and developing countries is discussed and all pros and cones are evaluated which would be helpful in drafting the policies of patent term extension for countries like India.

Keywords: Patent; Patent Term Adjustment; Patent Term Extension; Supplementary Protection Certificate.