 MONTREAL, Sept. 27, 2021 GLOBE NEWSWIRE -- PyroGenesis Canada Inc. NASDAQ: PYR TSX: PYR FRA: 8PY, a high-tech Company hereinafter referred to as the Company or PyroGenesis, that designs, develops, manufactures and commercializes advanced plasma processes and sustainable solutions to reduce greenhouse gases GHGs, is pleased to announce today that the United States Patent and Trademark Office has issued a Notice of Allowance for U.S. Patent No. 11116069, entitled, High power DC non transferred steam plasma torch system. This new patent covers the Companys high power DC steam plasma torch system, and relates to a steam plasma torch assembly wherein superheated steam is used as the main plasma forming gas, thereby resulting in a highly reactive steam plasma plume. The system is then used to destroy ozone depleting substances. 