Patent US2909585A successfully refreshed from Google Patents.
US2909585A
Expired / Lapsed
US
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Vacuum melting furnace
Assignee: Ohio Crankshaft Co
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Filing: 1956-06-29
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Granted: 1959-10-20
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Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Chester A Tudbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:33
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/067; H05B6/22; H05B6/24; H05B6/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US133099A
Cited
US1681950A
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AU32126A
Cited
GB305620A
Cited
GB304432A
Cited
US1775351A
Cited
US2381323A
Cited
US2498233A
Cited
FR1030775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |