Firstly, the renewal fee is to be paid before the expiration of the second year of the patent, which is essentially the start of the third year of the patent.
No different form is required for patent renewal. It can directly be paid by making request to the controller of patent.
No additional fee is to be paid except patent renewal fees.
The person who fails to renew patent on time can request a six month extension by paying a late fee.
The registration process is same as mentioned in the registration section.
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