ClearSign Technologies provides unique solutions to some of the world’s most pressing productivity, energy efficiency and pollution problems affecting the energy, oil and gas production, boiler and processing industries. ClearSign is based in Tulsa, OK with offices in Seattle, WA and Beijing, China.

Helpful links:

National Emission Standards for Hazardous Air Pollutants
ClearSign Patent List

Our Vision

Provide cost and energy efficient solutions that enable the world’s refining, petrochemical and boiler industries to meet the most stringent environmental toxic emissions regulations and increase efficiency.

We do this using a patented unique and revolutionary
ceramic-based combustion technology.

Dr. Jim Deller ClearSign CEO
Dr. Jim Deller and Jackson Pleis working at ClearSign Technologies, LLC
ClearSign Technologies leadership team meeting

A Letter From Our CEO

Thank you for visiting ClearSign’s website. The technology we provide creates industrial combustion with more efficiency and lower pollution than conventional equipment, and we are delivering these results to our industry through our partnerships.

As you navigate our website, you will find we are a business developing through partnerships and collaborations with some of the world’s leading industrial equipment providers. This enables our customers to obtain equipment that delivers the performance of ClearSign technology, with a “ClearSign Core™” or “ClearSign Eye™,” while being designed, manufactured, customized and serviced through the vast professional resources of our partners.

These partnerships allow ClearSign the ability to deliver the best solutions to our global customers while enhancing the business and product capability of our partners and collaborators. This business model also allows us to remain efficient and provides us the time and resources to continue developing revolutionary technology.

We are a publicly traded company (NASDAQ:CLIR), and we’re pleased to provide investor focused information on our website along with company news and product overviews.

For those interested in how ClearSign technology solutions can help with your challenges, our website provides a guide to our technology’s capabilities as well as our partner companies that supply engineering and manufactured equipment. For anyone interested in joining our team, either as an employee or supply partner, we would love to speak with you.

From our offices in Tulsa, Seattle and Beijing, welcome to ClearSign.

Jim Deller Ph.D.
CEO – ClearSign Technologies Corporation


ClearSign Asia Ltd.

ClearSign Asia Ltd. is a wholly owned subsidiary established in Hong Kong, and ClearSign China*, established in Beijing, is a subsidiary of ClearSign Asia Ltd.  These China and Hong Kong entities allow us to conduct business within the greater China and Asia Pacific region.  With the increased governmental regulations imposed on emissions, there is an urgent need for reduced NOx emissions, which is a perfect fit for ClearSign Technology.

In addition to the refining and petrochemical industries, there is a large addressable boiler market in the country’s district heating operations.  We’re working with local partners in China to leverage our unique technology and bring it to market with an asset-light business model.

*ClearSign Combustion (China) Environmental Technologies Co. Ltd.

CSEI Certification

Tulsa, OK


8023 E 63rd Pl. Suite 101
Tulsa, OK 74133

Seattle, WA


12864 Interurban Avenue South
Seattle, WA 98168



China World – Tower A
No. 1 Jian Guo Men Wai Avenue
Chao Yang District
Beijing, China 100004