US3379238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase electric furnace for molding ingots
Assignee: Lectromelt Corp
•
Filing: 1965-05-26
•
Granted: 1968-04-23
•
Expires: 1985-05-26
Abstract
No abstract record available.
Inventors
- 👤 Sieckman Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:59
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/60; C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; H05B7/00; H05B7/02; H05B7/10; H05B7/109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US757617A
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US1092764A
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US2191479A
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US2437782A
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US2525133A
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US2640860A
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US2801156A
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US2741553A
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US2908736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |