US1104077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic circuit-controlling device.
Assignee: AT&T Inc
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Filing: 1912-11-30
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Granted: 1914-07-21
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Expires: 1932-11-30
Abstract
No abstract record available.
Inventors
- 👤 William F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/34
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) | 1917-07-20 | 1918-01-19 | 1918-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-07-20 | 1922-01-19 | 1922-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-07-20 | 1926-01-19 | 1926-07-21 | $7700.00 | Window Closed / Lapsed |