US3061808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heaters
Assignee: Edwin L Wiegand Co
•
Filing: 1959-07-24
•
Granted: 1962-10-30
•
Expires: 1979-07-24
Abstract
No abstract record available.
Inventors
- 👤 Wiegand Edwin Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:57
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1213881A
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US1474723A
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US1727585A
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US1985280A
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US2087736A
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US2253981A
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US2490934A
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US2548423A
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US2866062A
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US2942223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |