Patent US1694536A successfully refreshed from Google Patents.
US1694536A
Expired / Lapsed
US
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Electric furnace
Assignee: CHARLES B FOLEY Inc
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Filing: 1920-03-13
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Granted: 1928-12-11
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Expires: 1940-03-13
Abstract
No abstract record available.
Inventors
- 👤 Charles B Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5241; C22; C22B; C22B4/00; Y; Y02; Y02P; Y02P10/00; Y02P10/25
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) | 1931-12-11 | 1932-06-11 | 1932-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-12-11 | 1936-06-11 | 1936-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-12-11 | 1940-06-11 | 1940-12-11 | $7700.00 | Window Closed / Lapsed |