Patent US2748248A successfully refreshed from Google Patents.
US2748248A
Expired / Lapsed
US
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Electric heating units
Assignee: Edwin L Wiegand Co
•
Filing: 1953-06-10
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Granted: 1956-05-29
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 Mcorlly Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:00
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)
US1660556A
Cited
DE604882C
Cited
FR817616A
Cited
US2248026A
Cited
US2147319A
Cited
US2502988A
Cited
US2615117A
Cited
US2610281A
Cited
US2632837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |