US3207887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating apparatus
Assignee: Edwin L Wiegand Co
•
Filing: 1962-07-24
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Granted: 1965-09-21
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Lester D Drugmand
- 👤 Sidney J Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:22
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
ELECTRIC HEATING APPARATUS COMPRISING AN ELONGATED HOUSING WHICH IS TROUGH-SHAPED IN CROSS-SECTION TO PROVIDE ONE CLOSED AND ONE OPEN SIDE, SAID HOUSING HAVING SPACED SIDE WALLS MARGINING THE OPEN SIDE OF SAID HOUSING, A TUBULAR SHEATHED ELECTRIC RESISTANCE HEATING ELEMENT SECURED TO SAID HOUSING AND DISPOSED BETWEEN THE SPACED SIDE WALLS THEREOF AND SAID ELEMENT EXTENDING BEYOND SAID HOUSING SIDE WALLS IN A DIRECTION OUTWARDLY OF THE OPEN HOUSING SIDE FOR ENGAGEMENT WITH A SURFACE TO BE HEATED, AND FLEXIBLE, HEAT-RESISTANT MATERIAL CARRIED BY SAID HOUSING AND PROJECTING BEYOND SAID HOUSING SIDE WALLS IN A DIRECTION OUTWARDLY OF SAID OPEN HOUSING SIDE AN AMOUNT SUBSTANTIALLY EQUAL TO THE CORRESPONDING AMOUNT OF PROJECTION OF SAID HEATING ELEMENT FOR REDUCING HEAT LOSS FROM THE INTERIOR OF SAID HOUSING THROUGH THE SPACE BETWEEN SAID HOUSING SIDE WALLS AND THE SURFACE TO BE HEATED.
Claim 2
Dependent Claim
140 words
ELECTRIC HEATING APPARATUS COMPRISING AN ELONGATED HOUSING WHICH IS TROUGH-SHAPED IN CROSS-SECTION TO PROVIDE ONE CLOSED AND ONE OPEN SIDE, SAID HOUSING HAVING SPACED SIDE WALLS MARGINING THE OPEN SIDE OF SAID HOUSING, A TUBULAR SHEATHED ELECTRIC RESISTANCE HEATING ELEMENT SECURED TO SAID HOUSING AND DISPOSED BETWEEN THE SPACED SIDE WALLS THEREOF AND SAID ELEMENT EXTENDING BEYOND SAID HOUSING SIDE WALLS IN A DIRECTION OUTWARDLY OF THE OPEN HOUSING SIDE FOR ENGAGEMENT WITH A SURFACE TO BE HEATED, AND FLEXIBLE, HEAT-RESISTANT MATERIAL CARRIED BY SAID HOUSING AND PROJECTING BEYOND SAID HOUSING SIDE WALLS IN A DIRECTION OUTWARDLY OF SAID OPEN HOUSING SIDE AN AMOUNT SUBSTANTIALLY EQUAL TO THE CORRESPONDING AMOUNT OF PROJECTION OF SAID HEATING ELEMENT FOR REDUCING HEAT LOSS FROM THE INTERIOR OF SAID HOUSING THROUGH THE SPACE BETWEEN SAID HOUSING SIDE WALLS AND THE SURFACE TO BE HEATED.
References Cited (Backward Citations)
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Cited
US2570376A
Cited
US2632087A
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US2668896A
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US2801320A
Cited
US3045098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |