US2907807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit for cold crucible arc melting furnaces
Assignee: General Electric Co
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Filing: 1957-03-26
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Granted: 1959-10-06
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Expires: 1977-03-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Noesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:25
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; H; H02; H02H; H02H7/00; H05; H05B; H05B7/00; H05B7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |