Patent US2648714A successfully refreshed from Google Patents.
US2648714A
Expired / Lapsed
US
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Hood for electric furnace
Assignee: Wyeth Holdings LLC
•
Filing: 1950-04-01
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Granted: 1953-08-11
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Expires: 1970-04-01
Abstract
No abstract record available.
Inventors
- 👤 Audley O Williams
- 👤 Walter G Mcburney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; F27B; F27B3/00; F27B3/10; F27B3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US572312A
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US826744A
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FR443994A
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US1635819A
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US1922312A
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US1992465A
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US2222004A
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US2286732A
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US2426643A
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US2488886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |