Patent US2667564A successfully refreshed from Google Patents.
US2667564A
Expired / Lapsed
US
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Electric heating
Assignee: Edwin L Wiegand Co
•
Filing: 1950-08-15
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Granted: 1954-01-26
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Expires: 1970-08-15
Abstract
No abstract record available.
Inventors
- 👤 Harry C Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:19
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10; F24C15/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418520A
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US2467348A
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US2357150A
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US2457007A
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US2502988A
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US2565432A
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US2565443A
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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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |