FOURTH POWER, INC.
Long-duration grid-scale energy storage system using liquid tin heat transfer in graphite plumbing
- Sector
- Energy
- Founded
- 2021
- Total capital
- $1.1M
- Federal grants
- $1.1M
- 1 award · 2025
- Rank in peer group#12 of 23
- Private capital raised
- None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- 4
- 13 pending · first 2025
- Rank in peer group#9 of 23
Capital timeline
Latest events
- Federal grantNSF · Phase II · SBIR Phase II: Advanced Thermal Battery Systems for Grid-Scale Energy Storage: Further Optimization of an Innovative Thermal Cycle Test Rig for Large-Scale Deployment$1.1M
Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.
Standing among 23 peers
Line = medianEnergy · System
- Federal grants#12 · top 52%
- Granted patents#9 · top 39%
Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.
Founders and team
No founders are linked to this company yet.
Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.
Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026
Claim this profile to add your teamWhat it has protected
USPTO · 4 granted of 17- GrantedThermophotovoltaic Receivers Comprising Extruded Cores and Integrated Submount Assemblies Supporting Thermophotovoltaic CellsUSPTOUS 12,671,358
- PendingGraphite-Based Infrastructures for Handling Molten Metals and Methods of Forming ThereofUSPTOApplication 19396122
- GrantedBrittle Material ValvesUSPTOUS 12,601,406
Show all 17 patent records
- Thermophotovoltaic Receivers Comprising Extruded Cores and Integrated Submount Assemblies Supporting Thermophotovoltaic CellsJun 30, 2026 · US 12,671,358Granted
- Graphite-Based Infrastructures for Handling Molten Metals and Methods of Forming ThereofMay 14, 2026 · Application 19396122Pending
- Brittle Material ValvesApr 14, 2026 · US 12,601,406Granted
- Low-Oxygen Facilities and Operating Thermal Batteries in Such FacilitiesMar 26, 2026 · Application 18897956Pending
- Brittle Material Joints With Dynamic SealingFeb 5, 2026 · Application 19354000Pending
- Brittle Material Joints With Dynamic SealingNov 11, 2025 · US 12,467,565Granted
- Thermal Battery Systems Comprising Emitter Units Equipped with Vapor BarriersJul 10, 2025 · Application 19014502Pending
- Circulation Pump Made from Brittle MaterialJun 26, 2025 · Application 19077822Pending
- Circulation Pump Made From Brittle MaterialApr 15, 2025 · US 12,276,282Granted
- Brittle Material ValvesApplication PCTUS2024012452Pending
- Brittle Material Joints With Dynamic SealingApplication PCTUS2024012463Pending
- Graphite-based Infrastructures For Handling Molten Metals And Methods Of Forming ThereofApplication PCTUS2025055514Pending
- Deposition Prevention By Diffusion BarrierApplication 63619157Pending
- Thermal Battery Systems Comprising Emitter Units Equipped With Vapor BarriersApplication PCTUS2025010865Pending
- Graphite Piping Assemblies Comprising Integrated Metals and Methods of Forming ThereofApplication 63720312Pending
- Thermophotovoltaic Receivers Comprising Extruded Cores and Integrated Submount Assemblies Supporting Thermophotovoltaic CellsApplication 63675822Pending
- Circulation Pump Made From Brittle MaterialApplication PCTUS2024012450Pending
Related companies, and why
- THERMAL BATTERY CORPORATIONShares a founder: Michael Hvasta
- KINETICCORE SOLUTIONS LLCSimilar federal contract value in Energy · null in contracts
- Feasible, Inc.Similar federal contract value in Energy · null in contracts
- Merlin Solar Technologies, Inc.Similar federal contract value in Energy · null in contracts
- Windscape AI Inc.Similar federal contract value in Energy · null in contracts
- ClearFlame Engines, Inc.Similar federal contract value in Energy · null in contracts
Regulatory activity · Energy
- Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
- List of Approved Spent Fuel Storage Casks: NAC International, Inc., MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 16 and 17 and Revisions to Amendment Nos. 0 Through 16Nuclear Regulatory Commission
- Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
- Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.
Sources
Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.
How to read this page
Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.
Data freshness
SEC Form D filings through . SBIR and STTR awards through .