Following ratification of the Patent Law Treaty (PLT) by Canada, new Patent Rules came into force on October 30, 2019 primarily to amended Canadian patent practices to comply with this treaty. See our articles herewhich describe in detail the changes brought in by the new Rules. Since their coming into force (CIF), we have seen a series of changes such as shortened deadlines, new correction procedures, submission of certified copies of priority documents, overhauled abandonment and reinstatement procedures and a requirement for a showing of due care for some reinstatements. Transitional provisions are included in the Patent Rules for applications having a filing date prior to the CIF.