22 CAP. 400] Patents if lodged at the Patent Office within such period as he may determine, to be dated with the date on which the complete specification was lodged at the Patent Office. (2) If the case of a convention application it 'is found that the invention claimed is not substantially the same as that claimed in the application made in the convention country in question, the Registrar may, subject to the provisions of subsection (6) of sectionfourteen­ (a) refuse to accept the application until it has been amended to his satisfaction; or (b) with the consent of the applicant, treat the application as an application in terms of section twelve. (3) If in the case of a convention application it is found that the specification lodged in Zambia includes an invention not included in the specification lodged in the convention country, the Registrar may allow the application to be proceeded with in so far as the invention included in both the convention and the Zambian specifi­ cation is concerned, and allow an application for the additional invention to be made and authorise such application, if lodged at the Patent Office within the period he may determine, to be dated with the date on which the Zambian specification was lodged at the Patent Office. (4) An appeal shall lie from any decision of the Registrar under this section. (As amended by G.N. No. 185 of 1964) Lapsing of applications 20. (1) If a complete specification is not accepted within thirty months from the date of lodging of an application, the application shall lapse unless­ (a) an appeal has been lodged in respect of the application; (b) the time within which such appeal may be lodged has not expired; or (c) the delay in accepting the specification was not due to any neglect or default on the part of the applicant: Provided that where an application is made for an extension of time for the acceptance of a complete specification, the Registrar shall, on payment of the prescribed fee, grant an extension of time to the extent applied for, but not exceeding three months. (2) If, at the expiration of the period allowed under the provisions of subsection (1), an appeal to the High Court is pending under any of the provisions of this Act in respect of the application (or, in the case of an application for a patent of addition, either in respect of that application or in respect of the application for the patent for the main invention) or the time within which such an appeal could be brought