---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-103180"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2023-09-22T23:59:59+00:00"
generated_at: "2026-06-10T09:38:08.330178+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# ClearSign receives $500K SoCalGas commitment plus $1.65M DOE grant for hydrogen burner

## Summary
- SoCalGas pledges $500,000 to promote field demonstration of ClearSign Core burner technology in Southern California.
- DOE Phase 2 SBIR grant of up to $1.65 million over two years for ultra-low NOx hydrogen burner development.
- Project scales burner from 2 MMBtu/hr to 8 MMBtu/hr for commercial industrial heating applications.
- Collaboration supports California net-zero goals and potential Angeles Link green hydrogen pipeline system.
- ClearSign's hydrogen burner targets below 5 ppm NOx while enabling 100% hydrogen fuel adoption.

## SEC filing metadata
- accession: 0001104659-23-103180
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2023-09-22T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465923103180/0001104659-23-103180-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465923103180/tm2326075d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-103180
- JSON: https://secwatch.observer/filing/0001104659-23-103180.json
- Plain text: https://secwatch.observer/filing/0001104659-23-103180.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.