CLEARSIGN COMBUSTION CORPORATION is a development stage company. The Company designs and develops technologies for combustion and emissions control with the aim of improving both the operating economics and the environmental performance of combustion systems. The Company’s core technologies currently include electrodynamic combustion control (ECC) and duplex burner technologies. ECC technology introduces a computer-controlled electric field into a combustion system in order to better control gas-phase chemical reactions and improve system performance and cost-effectiveness. Duplex burner technology uses a unique two-tier refractory tile configuration to reduce nitrogen oxide gas (NOx) emissions without the need for external flue gas recirculation, selective catalytic reduction, or higher excess air operation.