Company Implementing M Series Technology for Next Generation of Boiler Burners

TULSA, Okla., June 3, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that the Company has received a purchase order for a 500HP boiler burner from Rogue Combustion, a subsidiary of California Boiler.

TULSA, Okla., May 27, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, today announced that the Company's Board of Directors (the "Board") has voted to expand in size from five to seven directors and it appointed Anthony DiGiandomenico and Lou Basenese to fill such newly created vacancies and to serve as members of the Board, effective as of May 22, 2025. Further, on May 27, 2025, David M. Maley, a member of the Board, notified the Company that he will not stand for re-election upon the expiration of his term at the Company's 2025 annual meeting of stockholders. The Board has not yet determined whether it will reduce its size or nominate a replacement director at this time.

TULSA, Okla., May 21, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, today provides an update on operations for the quarter ended March 31, 2025.

Repeat Low Emissions Solution for Prominent California Energy Producer

TULSA, Okla., May 13, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that the Company has received an engineering order for an additional retrofit burner for a flare from an energy company for use in California. 

Hosting Call at 5pm ET on Wednesday, May 21st

TULSA, Okla., May 7, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that on Wednesday, May 21, 2025, the Company will host a conference call at 5:00 PM ET.  The Company will file its quarterly report on form 10-Q with the SEC in the coming days and will issue a summary of its financial and operating results for the quarter ending on March 31, 2025, in a press release on the day of the call.

Presentation on Thursday, April 10th at 11AM PT/2PM ET

TULSA, Okla., April 4, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces today that Jim Deller, Ph.D., Chief Executive Officer, will present and host one-on-one meetings with investors at the 15th Annual LD Micro Invitational. This event will take place at The Westin Grand Central in New York on April 9 and 10, 2025.

Company Achieves Record Annual Revenue of $3.6 Million

TULSA, Okla., April 2, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, today provides an update on operations for the full year ended December 31, 2024.

Hosting Call at 5pm ET on Wednesday, April 2nd

TULSA, Okla., March 18, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company") an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that on Wednesday, April 2, 2025, the Company will host a conference call at 5:00 PM ET.  The Company will file its annual report on form 10-K with the SEC in the coming days and will issue a summary of its financial and operating results for the full year ending on December 31, 2024, in a press release on the day of the call.

Burner Sold by Heater Manufacturer Devco Process Heaters

TULSA, Okla., March 12, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces they have received a purchase order for one of their new "M" series process burners, the ClearSign Core™ M1, from heater manufacturer Devco Process Heaters of Tulsa, Oklahoma ("Devco"). 

Technology Demonstrates Superior NOx and Efficiency Performance

TULSA, Okla., March 5, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that following the installation of a new burner technology into the Texas Gulf coast facility of a global chemical company, the Company is reporting selective catalytic reduction ("SCR") level nitrogen oxide ("NOx") emissions in addition to high heat transfer efficiency within the heater. The new burner technology, the first of this new "M" series, will be marketed as ClearSign Core™ M1.

TULSA, Okla., Feb. 27, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that, following the completion of the engineering order, the Company has received the purchase order for a flare from an energy company for use in California. 

First Commercial Trial Installation in Operating Facility

TULSA, Okla., Feb. 25, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that the Company is installing four ClearSign Eye sensors into a supermajor refinery located on the Gulf Coast of the U.S.

TULSA, Okla., Jan. 30, 2025 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that, in collaboration with a major national laboratory, it has been awarded a $400,000 grant from the U.S. Department of Energy's ("DOE") Energy Efficiency and Renewable Energy ("EERE") Industrial Efficiency and Decarbonization Office ("IEDO"). The funding will support the development of ClearSign's ultra-low NOx industrial hydrogen burner technology to advance the decarbonization of high-temperature industrial processes.

Companies Collaborating on Global Sales and Marketing

TULSA, Okla., Dec. 10, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign"), an emerging leader in industrial combustion and sensing technologies, announces the expansion of its collaboration with Zeeco, Inc. ("Zeeco," and together with ClearSign, the "Companies"), the world leader in advanced combustion solutions, to launch a co-branded process burner line that significantly reduces industrial process emissions. The new line of burners featuring ClearSign Core technology can fire 100% natural gas and 100% hydrogen while maintaining sub 5 ppm NOx to comply with strict emissions regulations.

TULSA, Okla., Dec. 9, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that it has received a notice from the Listing Qualifications Department of the Nasdaq Stock Market ("Nasdaq") on December 6, 2024, informing ClearSign that it has regained compliance with the minimum bid price requirement under Nasdaq Listing Rule 5550(a)(2) for continued listing on Nasdaq.

TULSA, Okla., Dec. 4, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that it has received a purchase order from Rogue Combustion, a subsidiary of California Boiler ("Cal Boiler"), for a boiler burner for use in their rental fleet. 

Continuation of Project from Engineering Order

TULSA, Okla., Nov. 27, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that it has received the follow-on purchase order to retrofit four process heaters with a total of 26 ClearSign Core™ burners from engineering and heater manufacturer Birwelco USA Inc. (a BIH Group company) as the next phase of the project to be installed in the Gulf Coast facility of a Fortune 500 global chemical company. 

Company Achieves Record Quarterly Revenue of $1.85MM     

TULSA, Okla., Nov. 20, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, today provides an update on operations for the quarter ended September 30, 2024.

TULSA, Okla., Nov. 12, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that it has received a purchase order for a boiler burner for use in an asphalt company in California. 

Hosting Call at 5pm ET on Wednesday, November 20th

TULSA, Okla., Nov. 6, 2024 /PRNewswire/ -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company an emerging leader in industrial combustion and sensing technologies that support decarbonization, improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces on Wednesday, November 20, 2024, the Company will host a conference call at 5:00 PM ET. The Company will file its quarterly report on form 10-Q with the SEC in the coming days and will issue a summary of its financial and operating results for the third quarter ending on September 30, 2024, in a press release on the day of the call.