Patents Ordinance, 2000 — section 24

24. Third party observations on patentability..—(1) At any time after the publication of the specification under section 21, any person may make observations in writing to the Controller on the novelty of the invention giving evidence in support of his observations and the Controller shall consider the observations in the light of the evidence made available to him before the grant of patent.

(2)The person who makes observations under sub-section (1) shall not become a party to the proceedings under this Ordinance before the Controller by reason only that he has made the observations, failing which the observations shall be rejected as if not filed at all. CHAPTER VII PROVISIONS FOR SECRECY OF CERTAIN INVENTIONS