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ClearSign Combustion CorporationClearSign Combustion CorporationClearSign Combustion CorporationClearSign Combustion Corporation
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Our patented technologies, embedded in established OEM products as ClearSign Core™, and ClearSign Eye™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries.

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ViewAll FilingsAnnual FilingsQuarterly FilingsCurrent FilingsRegistration StatementsSection 16Proxy & Information StatementsOther
FormDescriptionDateFormat
EFFECTNotice from the SEC of registration effectivenessMay 31, 2013Open Notice from the SEC of registration effectiveness in HTML.Open Notice from the SEC of registration effectiveness in DOC file.Open Notice from the SEC of registration effectiveness in PDF file.Open Notice from the SEC of registration effectiveness in XLS file.
SC 13D/AAmendment to a SC 13D filingFeb 25, 2013Open Amendment to a SC 13D filing in HTML.Open Amendment to a SC 13D filing in DOC file.Open Amendment to a SC 13D filing in PDF file.Open Amendment to a SC 13D filing in XLS file.
SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsJan 24, 2013Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.
SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsJan 15, 2013Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.
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Copyright 2023 ClearSign Technologies Corporation | All Rights Reserved.
  • Investors Home
  • News / Events
    • Company News
    • Events and Webcasts
    • Email Alerts
  • Company Information
    • Profile
    • FAQs
    • IR Contacts
    • Presentations
  • Stock Information
    • Stock Quote
    • Charts
    • Historical Data
  • Financial Information
    • Financials
    • Annual Reports
    • Proxy
  • SEC Filings
    • All SEC Filings
    • Section 16 Filings
  • Corporate Governance
    • Board of Directors
    • Board Committees
    • Governance Documents
ClearSign Combustion Corporation