US2396044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device
Assignee: AT&T Inc
•
Filing: 1941-12-10
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Granted: 1946-03-05
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Expires: 1961-12-10
Abstract
No abstract record available.
Inventors
- 👤 Fox Arthur Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:11
CPC Classifications
H; H03; H03C; H03C7/00; H03C7/02; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/122; H01P1/20; H01P1/207; H01P1/209
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) | 1949-03-04 | 1949-09-03 | 1950-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-04 | 1953-09-03 | 1954-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-04 | 1957-09-03 | 1958-03-05 | $7700.00 | Window Closed / Lapsed |