https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/india/filing-grant/can-i-claim

Can I claim priority for an application filed in India?

Yes, you can claim priority when filing a patent application in India. A certified copy of the priority document must be submitted within three months of the date of filing of the application. The priority period is 12 months from the earliest priority claimed. It is possible to claim multiple priorities. Domestic priority (based on a previously filed application in India) is also available.

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