law: Patents Act, 1970
  37. Consequences of secrecy directions
  (1) So long as any directions under section 35 are in force in
  
  respect of an application-
  (a) the Controller shall not pass an order
  
  refusing to accept the same; and
  (b) notwithstanding anything contained in this
  
  Act, no appeal shall lie from any order of the Controller passed in respect
  
  thereof:
  PROVIDED  that the application may, subject to the
  
  directions, proceed up to the stage of the acceptance of the complete
  
  specification, but the acceptance shall not be advertised nor the specification
  
  published, and no patent shall be granted in pursuance of the application.
  (2) Where a complete specification filed in pursuance of an
  
  application for a patent for an invention in respect of which directions have
  
  been given under section 35 is accepted during the continuance in force of the
  
  directions, then-
  (a) if, during the continuance in force of the
  
  directions; any use of the invention is made by or on behalf of, or to the
  
  order of the government, the provisions of sections 100, 101 and 103 shall
  
  apply in relation to that use as if the patent had been granted for the
  
  invention; and
  (b) if it appears to the Central Government
  
  that the applicant for the patent has suffered hardship by reason of the
  
  continuance in force of the directions the Central Government may make to him
  
  such payment (if any) by way of solatium as appears to the Central Government
  
  to be reasonable having regard to the novelty and utility of the invention and
  
  the purpose for which it is designed, and to any other relevant circumstances.
  (3) Where a patent is granted in pursuance of an application in
  
  respect of which directions have been given under section 35, no renewal fee
  
  shall be payable in respect of any period during which those directions were in
  
  force.