CALGARY, AB, Sept. 24, 2025 /CNW/ - Northstar Clean Technologies Inc. (TSXV:ROOF.VN) (OTC-BB:ROOOF) ("Northstar" or the "Company") is pleased to announce it successfully separated and recovered limestone from asphalt shingles, adding a fourth product line for the Company. Northstar has also been issued a new patent (the "Patent") by the United States Patent and Trademark Office ("USPTO") for this limestone recovery portion of the Company's proprietary asphalt shingle reprocessing technology. The Patent is expected to remain in force until 2045.
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