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When is the Post-grant opposition filed in Korea?

If no grounds for rejections are found by the Examiner, the patent is granted to an application. After the grant of patent, applicant has to pay first 3 years’ annuities as a registration fee within 3 months from the date of receipt of notice of patent grant.

After the applicant pays registration fee, KIPO publishes the patent. Once the patent is published in Patent Registration Gazette, any person may file an opposition against the patent within 3 months from the publication date.

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