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SEC Company Response from ClearSign Technologies Corp (CLIR) (CIK 0001434524) (CLIR) — Apr 20, 2012

ClearSign Technologies Corp (CLIR) (CIK 0001434524)
Date: April 20, 2012 · CIK: 0001434524 · Accession: 0001144204-12-022875

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File numbers found in text: 333-177946

Date
April 20, 2012
Author
Assistant Director
Form
CORRESP
Company
ClearSign Technologies Corp (CLIR) (CIK 0001434524)

Letter

VIA EDGAR United States Securities and Exchange Commission Division of Corporate Finance/Mail Stop 4561 Registration Statement on Form S-1 Filed on November 14, 2011 and amended on December 28, 2011, February 7, 2012, March 9, 2012, April 6, 2012 and April 18, 2012 File No. 333-177946

Dear Ms. Ravitz:

ClearSign Combustion Corporation (the “Company”) hereby requests that the Securities and Exchange Commission take appropriate action to make the above-captioned registration statement be ordered effective at 4 p.m., Eastern time, on April 24, 2012 or as soon as practicable thereafter.

In requesting acceleration, the Company acknowledges that:

(1) should the Commission or the staff, acting pursuant to delegated authority, declare the filing effective, it does not foreclose the Commission from taking any action with respect to the filing;

(2) the action of the Commission or the staff, acting pursuant to delegated authority in declaring the filing effective does not relieve the Company from its full responsibility for the adequacy and accuracy of the disclosure in the filing; and

(3) the Company may not assert the declaration of effectiveness as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States.

Very truly yours,
CLEARSIGN COMBUSTION CORPORATION

Show Raw Text
CORRESP
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CLEARSIGN COMBUSTION CORPORATION

12870 Interurban Avenue South

Seattle, Washington 98168

April 20, 2012

VIA EDGAR

Amanda Ravitz

Assistant Director

United States Securities and Exchange Commission

Division of Corporate Finance/Mail Stop 4561

100 F Street, N.E.

Washington, D.C. 20549

 Re: ClearSign Combustion Corporation

Registration Statement on Form S-1

Filed on November 14, 2011 and amended on December
28, 2011,

February 7, 2012, March 9, 2012, April 6, 2012 and
April 18, 2012

File No. 333-177946

Dear Ms. Ravitz:

ClearSign Combustion Corporation (the “Company”)
hereby requests that the Securities and Exchange Commission take appropriate action to make the above-captioned registration statement
be ordered effective at 4 p.m., Eastern time, on April 24, 2012 or as soon as practicable thereafter.

In requesting acceleration, the Company
acknowledges that:

(1)	should the Commission or the staff,
acting pursuant to delegated authority, declare the filing effective, it does not foreclose the Commission from taking any action
with respect to the filing;

(2)	the action of the Commission or the
staff, acting pursuant to delegated authority in declaring the filing effective does not relieve the Company from its full responsibility
for the adequacy and accuracy of the disclosure in the filing; and

(3)	the Company may not assert the declaration
of effectiveness as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of
the United States.

    Very truly yours,

    CLEARSIGN COMBUSTION CORPORATION

    By:
    /s/ Richard Rutkowski

    Richard Rutkowski, Chief Executive Officer