August 20, 2025
VIA EDGAR
U.S. Securities and Exchange Commission
Division of Corporation Finance
100 F Street, N.E.
Washington, D.C. 20549
| RE: | ClearSign Technologies Corporation |
| Registration Statement on Form S-1, as amended | |
| Filed August 12, 2025 | |
| File No. 333-289549 | |
| Acceleration Request | |
| Requested Date: Thursday, August 21, 2025 | |
| Requested Time: 5:00 p.m. Eastern Time |
Ladies and Gentlemen:
In accordance with Rule 461 under the Securities Act of 1933, as amended, the undersigned registrant (the “Registrant”) hereby requests that the Securities and Exchange Commission (the “Commission”) take appropriate action to cause the above-referenced Registration Statement on Form S-1 (File No. 333-289549) (as amended, the “Registration Statement”) to become effective on Thursday, August 21, 2025, at 5:00 p.m. Eastern Time, or as soon thereafter as possible, or at such later time as the Registrant or its outside counsel, Mitchell Silberberg & Knupp LLP, may orally request via telephone call to the staff.
Once the Registration Statement has been declared effective, please orally confirm that event with our outside counsel by calling Blake Baron at (917) 546-7709.
| Very truly yours, | ||
| ClearSign Technologies Corporation | ||
| By: | /s/ Colin James Deller | |
| Colin James Deller | ||
| Chief Executive Officer | ||
cc: Gabriel Miranda, Esq., Mitchell Silberberg & Knupp LLP
ClearSign Technologies Corporation – 8023 East 63rd Place, Suite 101, Tulsa, Oklahoma 74133 – Tel: 206.673.4848 –
www.clearsign.com