law: Patents Act, 1970
  22. Acceptance of complete specification 
  Subject to the provisions of section 21, the complete
  
  specification filed in pursuance of an application for a patent may be accepted
  
  by the Controller at any time after the applicant has complied with the
  
  requirements mentioned in sub-section (1) of that section, and, if not so
  
  accepted within the period allowed under that section for compliance with those
  
  requirements, shall be accepted as soon as may be thereafter.,
  PROVIDED  that the applicant may make an application to
  
  the Controller in the prescribed manner requesting him to postpone acceptance
  
  until such date not being later than eighteen months from the date on which the
  
  objections referred to in sub-section (1) of section 21 are forwarded to the
  
  applicant as may be specified in the application, and, if such application is
  
  made, the Controller may postpone acceptance accordingly.