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US898691A
Expired / Lapsed
US
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Electric-furnace process.
Assignee: Electro Metallurgical Co USA
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Filing: 1906-02-21
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Granted: 1908-09-15
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Expires: 1926-02-21
Abstract
No abstract record available.
Inventors
- 👤 George O Seward
- 👤 Franz Von Kuegelgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:57
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1911-09-15 | 1912-03-16 | 1912-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-09-15 | 1916-03-16 | 1916-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-09-15 | 1920-03-16 | 1920-09-15 | $7700.00 | Window Closed / Lapsed |