The process of examination starts with a request for examination. The request has to be made within 36 months from the date of priority or filing. However, if secrecy directions have been given for the application, the request can be made six months after the directions are revoked or thirty six months from the date of priority or filing, if that date is later.

On receiving the request, the controller shall direct the patent application to the Examiner for examination. To start with, the examiner makes a formal examination by verifying the propriety and correctness of all documents filed with the application. Later, he verifies the patentability of the application. The patentability analysis includes all patentability requirements.

After confirming that the application falls within the scope of patentable subject matter, the examiner conducts a prior art search to check if there is prior art, which anticipates the invention claimed. Prior art search for anticipation includes search for anticipation by publication, filing of complete specification, etc. He then verifies the existence of inventive step, Industrial application, and Enablement and Best mode.

The examiner will give the examination report within 1 month from the date of reference by controller and that term shall not exceed three months. If the examination report is adverse, the controller sends a notice to the applicant and gives him an opportunity to correct and if necessary an opportunity of hearing. The Controller might ask the applicant to amend the application in order to proceed further. If the applicant does not make such changes, the application might be rejected.

The Controller has the power to divide the application, post-date the application, substitute applicants and reject the application. An order of division will be given if the application contains more than one invention and if it is required to file separate applications for each invention. The application might be post-dated to a period of six months if requested by the applicant. Substitution of inventors is generally done if the inventor has been wrongfully mentioned or if a joint inventor has not been mentioned in the application.

The controller has the power to reject the application, if the applicant does not comply with his requirements.