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 :b. by the Government or by any person authorised by the Government or by a Government undertaking, in consequence of the applicant for the patent or any person from whom he derives title having communicated or disclosed the invention directly or indirectly to the Government or person authorised as aforesaid or to the Government undertaking; or


 * c. by any other person, in consequence of the applicant for the patent or any person from whom he derives title having communicated or disclosed the invention, and without the consent or acquiescence of the applicant or of any person from whom he derives title.

(4) Without prejudice to the provisions contained in sub-section (1), a patent may be revoked by the High Court on the petition of the Central Government, if the High Court is satisfied that the patentee has without reasonable cause failed to comply with the request of the Central Government to make, use or exercise the patented invention for the purposes of Government within the meaning of section 99 upon reasonable terms.

(5) A notice of any petition for revocation of a patent under this section shall be served on all persons appearing from the register to be proprietors of that patent or to have shares or interests therein and it shall not be necessary to serve a notice on any other person.

65. Revocation of Patent or amendment of complete specification on directions from Government in cases relating to atomic energy

(1) Where at any time after acceptance of a complete specification, the Central Government is satisfied that an application for a patent or a patent is for an invention relating to atomic energy for which no patent can be granted under sub-section (1) of section 20 of the Atomic Energy Act, 1962, it may direct the Controller to refuse to proceed further with the application or to revoke the patent, as the case may be, and thereupon the Controller, after giving notice to the applicant or, as the case may be, to the patentee and every other person whose name has been entered in the register as having an interest in the patent, and after giving them an opportunity of being heard, may refuse to proceed further with the application or may revoke the patent.

(2) In any proceedings under sub-section (1), the Controller may allow the applicant for the patent or the patentee to amend the complete specification in such manner as he considers necessary instead of refusing to proceed with the application or revoking the patent.

66. Revocation of patent in public interest 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.

CHAPTER XIII

REGISTER OF PATENTS

67. Register of patents and particulars to be entered therein.

(1) There shall be kept at the patent office a register of patents, wherein shall be entered