How a Patent Specification is prepared? When is an Application for patent published as per the Patent Act, 1970 ?

A patent specification can be prepared by the applicant himself or his registered and authorized agent. The patent specification generally comprises of the title of the invention indicating its technical field, prior art, draw backs in the prior art, the solution provided by the inventor to obviate the drawbacks of the prior art, a concise but sufficient description of the invention and its usefulness, drawings (if any) and details of best method of its working. The complete specification must contain atleast one claim or statement of claims defining the scope of the invention for which protection is sought for. Every application for patent is published after expiry of 18 months from the date of its filing or priority date whichever is earlier. However, following applications are not published. Application in which secrecy direction is imposed. Application which has been abandoned u/s 9(1) and i.e. when a provisional application has been filed and the complete application has not been filed with 12 months from the filing of the provisional application. Application which has been withdrawn 3 months prior to 18 months.