Patent US3454747A successfully refreshed from Google Patents.
US3454747A
Expired / Lapsed
US
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Flexible electric heating cable
Assignee: OLIVER M HART
•
Filing: 1967-03-27
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Granted: 1969-07-08
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Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 Oliver M Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:06
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50; H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2075686A
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GB471122A
Cited
US2528966A
Cited
US2529914A
Cited
US2982932A
Cited
US3045102A
Cited
US3190065A
Cited
US3322889A
Cited
US3356787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |