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Seattle, WA, United States of America

Clearsign Combustion Corporation

USPTO Granted Patents = 83

EPO Patents = 3

Trademarks = 6

Forward Citations = 897

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24 inventors (with patents filed for the assignee):

Christopher A Wiklof (72 out of 206 patents)

Joseph Colannino (60 out of 71 patents)

Igor A Krichtafovitch (40 out of 70 patents)

4. Douglas Wayne Karkow (29 out of 48 patents)

5. David B Goodson (23 out of 31 patents)

6. Robert E Breidenthal (19 out of 34 patents)

7. Tracy A Prevo (13 out of 13 patents)

8. Thomas S Hartwick (6 out of 6 patents)

9. Roberto G Ruiz (5 out of 14 patents)

10. Jesse Dumas (4 out of 9 patents)

11. Richard F Rutkowski (4 out of 4 patents)

12. James Kyle Dansie (4 out of 15 patents)

13. Vincenzo Casasanta, Iii (2 out of 52 patents)

14. Kraig K Anderson (2 out of 20 patents)

15. Donald W Kendrick (2 out of 28 patents)

Core Competencies:

Perforated Flame Holder

Low NOx Burner

Electrodynamic Combustion Control

Combustion System

Cooled Ceramic Electrode

Fluid Heater

Ionizer

Burner System

Combustion Reaction Control

Electric Field Application

Transient Combustion Control

Multijet Burner

83 patents: Sort by Forward Citations

1. 11221137 - Field installed perforated flame holder and method of assembly and installation (2022-01-11),

2. 10619845 - Cooled ceramic electrode supports (2020-04-14),

3. 10571124 - Selectable dilution low NOx burner (2020-02-25),

4. 10539326 - Duplex burner with velocity-compensated mesh and thickness (2020-01-21),

5. 10514165 - Perforated flame holder and system including protection from abrasive or corrosive fuel (2019-12-24),

6. 10458649 - Horizontally fired burner with a perforated flame holder (2019-10-29),

7. 10458647 - Adaptor for providing electrical combustion control to a burner (2019-10-29),

8. 10422523 - Ionizer for a combustion system (2019-09-24),

9. 10386062 - Method for operating a combustion system including a perforated flame holder (2019-08-20),

10. 10364984 - Burner system including at least one coanda surface and electrodynamic control system, and related methods (2019-07-30),

11. 10364980 - Control of combustion reaction physical extent (2019-07-30),

12. 10359213 - Method for low NOx fire tube boiler (2019-07-23),

13. 10359189 - Electrodynamic combustion control with current limiting electrical element (2019-07-23),

14. 10337729 - Fuel combustion system with a perforated reaction holder (2019-07-02),

15. 10295185 - Flame visualization control for electrodynamic combustion control (2019-05-21),

ClearSign Combustion Corporation is a leading provider of innovative combustion and emissions control solutions for various industries including refineries, petrochemical plants, and power generation. The company's patented technologies offer superior performance, energy efficiency, and reduced emissions, helping clients achieve environmental compliance and cost savings. With a strong focus on research and development, ClearSign Combustion Corporation continues to drive innovation in the combustion industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

83 Patents

#24 in Seattle, WA

#71 in Washington

#4,305 in US

#8,822 in the World

Seattle, WA, United States of America

Clearsign Combustion Corporation

Forward Citations = 897

24 inventors:

Christopher A Wiklof (72 out of 206 patents)

Joseph Colannino (60 out of 71 patents)

Igor A Krichtafovitch (40 out of 70 patents)

4. Douglas Wayne Karkow (29 out of 48 patents)

5. David B Goodson (23 out of 31 patents)

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