CLEARSIGN COMBUSTION CORPORATION (NASDAQ:CLIR) Files An 8-K Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

Item 5.02

To the extent required by Item 5.02, the information included at
Item 8.01 below is incorporated herein by reference.

Mr. Andrew Lee, our Senior Vice President of Business
Development, has expressed to us his desire to retire prior to
January 1, 2018. Mr. Lee has agreed to continue providing
services to us until a successor is hired and, if we so require,
Mr. Lee has indicated that he will continue to provide services
to us following the hire to assure a smooth transition to his
successor. We intend to begin a search for Mr. Lees successor
immediately.

About CLEARSIGN COMBUSTION CORPORATION (NASDAQ:CLIR)

ClearSign Combustion Corporation is engaged in designing and developing technologies for managing various performance characteristics of combustion systems, such as emission and operational performance, and energy efficiency. The Company’s Duplex and Electrodynamic Combustion Control (ECC) platform technologies are used to manage the performance of combustion systems in a range of markets, including the refinery, petrochemical, chemical, power and commercial boiler industries. The Duplex burner technology typically consists of a traditional industrial burner and a porous ceramic tile. The ECC technology includes various components, such as a computer, standard software delivering algorithms to a power amplifier (resident outside the combustion chamber) and electrodes inside the combustion chamber. The ECC technology introduces a computer-controlled high voltage electric field into a combustion volume in order to control gas-phase chemical reactions.

CLEARSIGN COMBUSTION CORPORATION (NASDAQ:CLIR) Recent Trading Information

CLEARSIGN COMBUSTION CORPORATION (NASDAQ:CLIR) closed its last trading session 00.00 at 3.60 with 19,225 shares trading hands.