US3056868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device
Assignee: AT&T Inc
•
Filing: 1959-08-03
•
Granted: 1962-10-02
•
Expires: 1979-08-03
Abstract
No abstract record available.
Inventors
- 👤 Oscar D Jacobson
- 👤 Hubert K Krantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:53
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2187115A
Cited
US2245391A
Cited
US2821597A
Cited
US2907846A
Cited
DE1059567B
Cited
US3009998A
Cited
US2981810A
Cited
US2978556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |