Northstar Clean Technologies Inc. announce that it has received a Notice of Advanced Examination (the "Notice") from the Canadian Patent Office dated February 1, 2023. The Notice confirms approval by CPO of Northstar's request for advance examination of its patent application for the Company's innovative technology for reprocessing asphalt shingles on the grounds that the application relates to green technology that either helps resolve or mitigate environmental impacts or conserves the natural environment or natural resources.