Patent US2807696A successfully refreshed from Google Patents.
US2807696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating devices
Assignee: Edwin L Wiegand Co
•
Filing: 1953-01-07
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Granted: 1957-09-24
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Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Alben C Boggs
- 👤 Thomas M Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:40
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23679E
Cited
GB557765A
Cited
US2460795A
Cited
US2490934A
Cited
US2536003A
Cited
US2538808A
Cited
US2659795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |