https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/india/after-grant/can-lapsed-patent
Can a lapsed patent be restored in India?
In India, provided the failure to pay the annual fee was unintentional, patent holders can file a request for restoration of a patent within 18 months of the lapse date, subject to the payment of an additional fee.
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