Patent US2939807A successfully refreshed from Google Patents.
US2939807A
Expired / Lapsed
US
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Method of making a heating panel
Assignee: Thermway Ind Inc
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Filing: 1956-06-29
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Granted: 1960-06-07
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Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Basil A Needham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:44
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/26; H05B3/262; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF MAKING AN ELECTRICAL RADIANT HEATER COMPRISING, HEATING A METAL SHEET TO APPROXIMATELY 1500* F. AND WHILE MAINTIANING THE SHEET AT SUCH TEMPERATURE APPLYING AN INSULATING, HARD, VITREOUS COATING TO BOTH SURFACES OF SAID SHEET, ANNEALING SAID COATED SHEET, REHEATING SAID COATED SHEET TO A TEMPEATURE OF APPROXIMATELY 550*F. AND WHILE MAINTAINING THE COATED SHEET AT SUCH TEMPERATURE APPLYING A COATING OF METAL TO ONE COATED SURFACE THEREOF, THEN ETCHING SAID METAL COATING TO PROVIDE A GRID-LIKE PATTERN.
Claim 2
Independent Claim
80 words
THE METHOD OF MAKING AN ELECTRICAL RADIANT HEATER COMPRISING, HEATING A METAL SHEET TO APPROXIMATELY 1500* F. AND WHILE MAINTIANING THE SHEET AT SUCH TEMPERATURE APPLYING AN INSULATING, HARD, VITREOUS COATING TO BOTH SURFACES OF SAID SHEET, ANNEALING SAID COATED SHEET, REHEATING SAID COATED SHEET TO A TEMPEATURE OF APPROXIMATELY 550*F. AND WHILE MAINTAINING THE COATED SHEET AT SUCH TEMPERATURE APPLYING A COATING OF METAL TO ONE COATED SURFACE THEREOF, THEN ETCHING SAID METAL COATING TO PROVIDE A GRID-LIKE PATTERN.
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |