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.
|EFFECT||Notice from the SEC of registration effectiveness||Jul 15, 2019|
|CORRESP||Correspondence from the Filer to the SEC||Jul 10, 2019|
|UPLOAD||Correspondence from the SEC to the Filer||Jul 10, 2019|
|SC 13D/A||Amendment to a SC 13D filing||Jul 5, 2019|
|25-NSE||Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities||Jan 25, 2019|
|SC 13D||Filing by person(s) reporting owned shares of common stock in a public company >5%||Jan 18, 2019|