Section 66 of the Indian Patents Act
Section 66 of the Indian Patents Act 1970 is about Revocation of patent in public interest. It is under CHAPTER XII of the Act. CHAPTER XII is titled SURRENDER AND REVOCATION OF PATENTS.
Where the Central Government is of opinion that a patent or the mode in which it is exercised is mischievous to the State or generally prejudicial to the public, it may, after giving the patentee an opportunity to be heard, make a declaration to that effect in the Official Gazette and thereupon the patent shall be deemed to be revoked.
Section 65 Indian Patents Act 1970 (Revocation of patent or amendment of complete specification on directions from Government in cases relating to atomic energy.)