In the case of M/s Hi Tech Chemicals Limited vs Deputy Controller of Patents and Designs & Anr., the Madras High Court examined whether documents labeled as additional evidence could be admitted after the hearing was fixed in a post-grant patent opposition. The Court looked at the patent rules, and held that private documents do not qualify as “publications” under Rule 62(4), and are therefore not admissible after the hearing date was fixed.
Read more about Once the Hearing Is Fixed, the Door Closes on New Evidence in Patent Oppositions