Revocation of patent can be invoked by

Under section 64(1) of the Patents Act, 1970 a patent may be revoked on a petition by any person interested or by the Central Government, or on a counter-claim in a suit for infringement; since the Appellate Board was abolished in 2021, such petitions go to the High Court. The options naming only an aggrieved person, or only a person interested, leave out the other routes the section provides.