Patents Act, 1970
35. Secrecy directions relating to inventions relevant for defense purposes
(1) Where, in respect of an application made before or after the commencement of this Act for a patent, it appears to the Controller that the invention is one of a class notified to him by the Central Government as relevant for defense purposes, or, where otherwise the invention appears to him to be so relevant, he may give directions for prohibiting or restricting the publication of information with respect to the invention or the communication of such information to any person or class of persons specified in the directions.
(2) Where the Controller gives any such directions as are referred to in sub-section (1), he shall give notice of the application and of the directions to the Central Government, and the Central Government shall, upon receipt of such notice, consider whether the publication of the invention would be prejudicial to the defense of India, and if upon such consideration, it appears to it that the publication of the invention would not so prejudice, give notice to the Controller to that effect, who shall thereupon revoke the directions and notify the applicant accordingly.
(3) Without prejudice to the provisions contained in sub-section (1), where the Central Government is of opinion that an invention in respect of which the Controller has not given any directions under sub-section (1), is relevant for defense purposes, it may at any time before acceptance of the complete specification notify the Controller to that effect, and thereupon the provisions of that sub-section shall apply as if the invention were one of the class notified by the Central Government of the directions issued by him.