Petrochemical Client Requesting Performance Mapping for Future Deployment  TULSA, Okla., September 23, 2025 -- ClearSign Technologies Corporation (Nasdaq: CLIR) (“ClearSign” or the “Company”), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today announces that it has

Project Comprised of 36 ClearSign Core™ Process Burners in One Heater                                                                       TULSA, Okla., September 17, 2025 -- ClearSign Technologies Corporation (Nasdaq: