ClearSign designs, develops and markets technologies that aim to improve the key performance characteristics of combustion systems, including emission, operational performance, energy efficiency and overall cost effectiveness.
|DEF 14A||Official notification to shareholders of matters to be brought to a vote ("Proxy")||Apr 4, 2019|
|PRE 14A||A preliminary proxy statement providing notification matters to be brought to a vote||Mar 21, 2019|
|PRRN14A||Non-management revised preliminary proxy soliciting materials||Dec 6, 2018|
|PREC14A||Preliminary proxy statement containing contested solicitations||Nov 19, 2018|
|DEFA14A||Additional proxy soliciting materials - definitive||Nov 13, 2018|
|PREN14A||Non-management preliminary proxy statements not involving contested solicitations||Nov 9, 2018|