The Industrial Property Act, 2001 50 (4) An application for revocation or invalidation of a patent shall: (a) state the grounds on which the applicant intends to rely on in his application for revocation or invalidation of the patent, and (b) be accompanied by:(i) a statement setting out particulars of the facts alleged in support of the said grounds; and (ii) proof of service on the owner of the patent of notice of filing of the application under subsection (1) and (2) and such a statement shall be furnished to the Tribunal. (5) If the owner of the patent wished to contest the application he shall, within such time as is prescribed or such further time as the Tribunal may allow, lodge with him a counter statement setting out particulars of the grounds upon which the application is to be contested. (6) A copy of any counter-statement in terms of subsection (5) lodged with the Tribunal shall be served by the owner of the patent concerned. (7) Particulars delivered in terms of this section may from time to time, with the leave of the Tribunal, be amended. (8) No evidence shall be admitted in proof of any ground on which particulars have not been delivered in terms of this section, except by leave of the Tribunal. (9) After receiving an application under subsection (1) and compliance with any other provisions of this section which are applicable, the Tribunal shall arrange for the matter to be heard in the manner prescribed and may make such order herein as it deems fit. (10) The Tribunal shall publish the application for revocation or invalidation of the patent in the Kenya Gazette or in the Industrial Property Journa l. (11) An aggrieved party may appeal against the decision of the Tribunal to the High Court. (12) Where the provisions of subsection (2) apply only to some of the claims or some parts of a claim, or some parts of a registered industrial design only those claims or parts may be revoked or invalidated by the Tribunal. (13) The Tribunal may require the owner of the patent, the utility model or the industrial design registration certificate to submit to it for the purposes of examination, the registration certificate, publications and other documents showing the prior art which have been referred to either in connection with an application for a title to the patent, the utility model or the industrial design filed, for the same or essentially the same invention or design by the