The term of protection of an Indian patents is 20 years from the date of filing of the application. Of course, this is subject to the payment of annual fees. The 20-year term was introduced by the Patents (Amendment) Act 2002. It also applies to all granted patents whose term had not expired on 20 May 2003. Under the previous law the term was 14 years from the date of filing.
The term of protection of Indian patents is now streamlined with most patent terms across the world. That is to say, most countries offer patent protection for 20 years. Now, so does India.
Also, do make sure that you check out this free e-book: A Quick Guide to Patents. Basically, it deals with basics of patent procedures.
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