Hosting Meeting at 1pm CT on Tuesday, June 6^th, 2023

TULSA, Okla., May 23, 2023 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that improve energy, operational efficiency and safety while dramatically reducing emissions, announces that the Company will host a virtual annual meeting (the "Annual Meeting") on Tuesday, June 6, 2023, at 1:00 p.m. Central Daylight Standard Time.

Investors are invited to attend the 2023 annual meeting of shareholders of ClearSign Technologies Corporation. The Annual Meeting will be completely virtual conducted live via the Internet. You will be able to attend the Annual Meeting online. To participate in the Annual Meeting, visit www.virtualshareholdermeeting.com/CLIR2023 and enter the 16-digit control number included on your Notice of Internet Availability, proxy card, or voting instruction form. You may begin to log into the meeting platform beginning at 12:45 p.m. that day. Shareholders will also have the opportunity to submit questions during the Annual Meeting through the same link. A technical support telephone number will be posted on the log-in page of www.virtualshareholdermeeting.com/CLIR2023 you can call if you encounter any difficulties accessing the virtual meeting during the meeting.

About ClearSign Technologies Corporation

ClearSign Technologies Corporation designs and develops products and technologies for the purpose of improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety and overall cost-effectiveness. Our patented technologies, embedded in established OEM products as ClearSign Core™, and ClearSign Eye™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries. For more information, please visit www.clearsign.com.

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SOURCE ClearSign Technologies Corporation