826 No. 40 of 2016] Inspection of application Opposition to grant of patent Patents 55. (1) Subject to section ninety-four, an application for the grant of a patent and all accompanying documents shall, on payment of the prescribed fee, be open for inspection by the public during prescribed hours, after the Registrar has accepted and published the application in accordance with section fifty-four. (2) Where an application for the grant of a patent, which claims a priority date, is open to inspection, as specified in subsection (1), any other application from which such application claims priority shall equally be open for inspection in a like manner. 56. A person, including the State, may oppose the grant of a patent at any time, within a period of three months from the date an application for a grant of a patent is advertised, or within such further period as the Registrar may allow, and before the sealing of the patent, by filing a written notice of opposition to the Registrar, stating any of the following grounds: (a) that the applicant is not entitled in accordance with section twenty-three, to make an application for the grant of a patent; (b) that the person making the application or the person through whom the applicant claims an invention, wrongfully obtained the invention or any part of it from the person opposing the grant; (c) that an invention claimed in a complete specification is also claimed in another complete specification published on or before the priority date of an applicant’s claim and filed in pursuance of an application for a grant of a patent and has a priority date which is earlier than that of an applicant’s claim; (d) that an invention claimed in a complete specification is not new as it was publicly known or publicly used in Zambia or elsewhere before the priority date of that claim; (e) that an invention claimed in a complete specification is obvious and does not involve any inventive step; (f) that the subject matter of a claim in a complete specification is not an invention, is not patentable or is excluded from patent protection in accordance with this Act; (g) that an invention claimed in the complete specification does not have any industrial use or application; (h) that the complete specification does not sufficiently describe the invention and the best method or manner in which it is to be performed;