Patent US2725455A successfully refreshed from Google Patents.
US2725455A
Expired / Lapsed
US
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Electric heating devices
Assignee: Edwin L Wiegand Co
•
Filing: 1951-12-15
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Granted: 1955-11-29
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Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Mcorlly Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:57
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2028604A
Cited
DE643829C
Cited
US2272658A
Cited
US2270293A
Cited
US2250357A
Cited
US2288967A
Cited
US2615117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |