(i)A request for examination under section 11-B shall be made in Form 18 [within forty-eight months] [ Substituted by S.O. 657(E), dated 5.5.2006, for " after the publication of the application but within thirty-six months" (w.e.f. 5.5.2006).] from the date of priority of the application or from the date of filing of the application, whichever is earlier;