US3072775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater assembly and method
Assignee: Edwin L Wiegand Co
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Filing: 1960-08-11
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Granted: 1963-01-08
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Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Ammerman George Edward
- 👤 John F Benko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:55
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/76
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A HEATER ASSEMBLY COMPRISING AN ELONGATED SHEATHED ELECTRIC RESISTANCE HEATING ELEMENT HAVING A CONVOLUTED HEAT-GENERATING PORTION PROVIDING A CENTRALLY APERTURED HEATING SURFACE FOR UNDERLYING A VESSEL TO BE HEATED, AN ELEMENT SUPPORTING STRUCTURE, AND A SUPPORT MEMBER UNDERLYING AND SUPPORTING THE HEAT-GENERATING PORTION OF SAID ELEMENT AND PROVIDING THREE LEGS ARRANGED IN SPOKELIKE RELATION WITH EACH OTHER AND HAVING THEIR OUTERMOST ENDS ENGAGED WITH SAID STRUCTURE, ONE OF SAID LEGS BEING IMMOVABLY SECURED TO SAID HEAT-GENERATING ELEMENT PORTION WHILE SAID OTHER LEGS ARE SECURED TO SAID ONE LEG RADIALLY OUTWARDLY OF THE APERTURE IN SAID HEATING SURFACE, EACH OF SAID OTHER LEGS HAVING AN ARCUATE PORTION PARTIALLY CIRCUMSCRIBING SAID HEATING SURFACE APERTURE AND UNDERLYING AND SUPPORTING RESPECTIVE SEGMENTS OF THE INNERMOST ELEMENT CONVOLUTION.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |