ClearSign Technologies Corp. CLIR

What this company does

We design and develop technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial combustion systems, including emission and operational performance, energy efficiency, and overall cost-effectiveness. We believe that our patented ClearSign Core™ technology can enhance the performance of combustion systems in a broad range of markets, including the energy (upstream oil production, midstream gas processing and transportation, and down-stream refining), institutional, commercial and industrial boiler, chemical, and petrochemical industries. Our ClearSign CoreTM technology, which is our primary technology, uses either a porous ceramic structure or metal flame holder device held at a distance from the injection planes of a burner to significantly reduce flame length and achieve low emissions without the need for external flue gas recirculation, selective catalytic reduction, or high excess air systems. To date, our operations have been funded primarily through sales of our equity securities. We believe that it is in the best interests of the Company and our stockholders to develop our business utilizing an “asset light” model. As of December 31, 2025, we had 15 full-time employees, and no part-time employees.

Written from the business description in ClearSign Technologies Corporation's annual report to the U.S. Securities and Exchange Commission, filed 31 March 2026. Every sentence was checked against that document before publication.