US3519755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic switching arrangement for telephone exchanges providing rerouting facility
Assignee: The General Electric Company PLC
•
Filing: 1967-03-28
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Granted: 1970-07-07
•
Expires: 1987-03-28
Abstract
No abstract record available.
Inventors
- 👤 Robin Devenish Allum
- 👤 Ronald Frank Rous
- 👤 Cecil John Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:29
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172947A
Cited
US3283081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |