US3144545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating assembly
Assignee: HEATED CONCRETE PRODUCTS Inc
•
Filing: 1962-03-26
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Granted: 1964-08-11
•
Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Frank E Shrimplin
- 👤 Virgil W Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/286; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A COMBINATION HEATING AND REINFORCING STRUCTURE ADAPTED TO BE EMBEDDED IN A PORTABLE SLAB, COMPRISING A RIGID GRID MADE UP OF A PLURALITY OF SUBSTANTIALLY PARALLEL, LONGITUDINALLY-EXTENDING MEMBERS AND A PLURALITY OF SUBSTANTIALLY PARALLE, TRANSVERSELY-EXTENDING MEMBERS BRIDGING AND WELDED TO ALL OF SAID LONGITUDINALLY-EXTENDING MEMBERS, AN INSULATED ELECTRIC RESISTANCE UNIT LOOSELY WOVEN THROUGH THE MESH DEFINED BY SAID GRID IN A PATTERN OF SUBSTANTIALLY UNIFORM DISTRIBUTION OVER THE SURFACE OF SAID GRID AND FREE FROM ATTACHMENT TO SAID GRID, AND FLEXIBLE, INSULATED ELECTRIC LEADS CONNECTED TO THE ENDS OF SAID RESISTANCE UNIT AND EXTENDING FREELY TO A SIGNIFICANT DISTANCE AWAY FROM SAID GRID.
Claim 2
Dependent Claim
103 words
A COMBINATION HEATING AND REINFORCING STRUCTURE ADAPTED TO BE EMBEDDED IN A PORTABLE SLAB, COMPRISING A RIGID GRID MADE UP OF A PLURALITY OF SUBSTANTIALLY PARALLEL, LONGITUDINALLY-EXTENDING MEMBERS AND A PLURALITY OF SUBSTANTIALLY PARALLE, TRANSVERSELY-EXTENDING MEMBERS BRIDGING AND WELDED TO ALL OF SAID LONGITUDINALLY-EXTENDING MEMBERS, AN INSULATED ELECTRIC RESISTANCE UNIT LOOSELY WOVEN THROUGH THE MESH DEFINED BY SAID GRID IN A PATTERN OF SUBSTANTIALLY UNIFORM DISTRIBUTION OVER THE SURFACE OF SAID GRID AND FREE FROM ATTACHMENT TO SAID GRID, AND FLEXIBLE, INSULATED ELECTRIC LEADS CONNECTED TO THE ENDS OF SAID RESISTANCE UNIT AND EXTENDING FREELY TO A SIGNIFICANT DISTANCE AWAY FROM SAID GRID.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |