Patent US2932679A successfully refreshed from Google Patents.
US2932679A
Expired / Lapsed
US
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Fume-collecting hood for electric furnace
Assignee: United States Steel Corp
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Filing: 1958-12-19
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Granted: 1960-04-12
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Expires: 1978-12-19
Abstract
No abstract record available.
Inventors
- 👤 David W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:09
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; F27D1/1808; F27D1/1816; F27D17/00; F27D17/30; F27D17/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US783736A
Cited
US1018727A
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US1234946A
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US1922312A
Cited
CH198255A
Cited
US2672491A
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US2761003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |