US3231676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for selection of alternative paths in telephone networks
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1961-12-01
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Granted: 1966-01-25
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Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
- 👤 Carlstrom Per Alfred
- 👤 Mannby Per-Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
A TELEPHONE SYSTEM COMPRISING A PLURALITY OF OFFICES HAVING INDIVIDUAL DESIGNATIONS, A PLURALITY OF COMMUNICATION CHANNELS INTERCONNECTING THE OFFICES IN A NETWORK IN WHICH A CALLING ONE OF THE OFFICES CAN REACH A CALLED ONE OF THE OFFICES OVER A COMMUNICATION PATH EXTENDED OVER ROUTES INCLUDING DIFFERENT INTERMEDIATE ONES OF THE OFFICES AND CHANNELS, ROUTING MEANS IN THE INTERMEDIATE OFFICES FOR SELECTING AN OUTGOING CHANNEL FROM THE INTERMEDIATE OFFICES FOR INCLUSION IN THE COMMUNICATION PATH REPRESENTING A PREFERRED ROUTE OR AN ALTERNATE ROUTE IN DEPENDENCE ON THE AVAILABILITY OF CHANNELS AT EACH INTERMEDIATE OFFICE, AND MEANS RESPONSIVE TO THE SELECTION OF A GIVEN NUMBER OF ALTERNATE ROUTES BY THE ROUTING MEANS IN THE INTERMEDIATE OFFICES OF A COMMUNICATION PATH FOR PREVENTING THE SELECTION AND INCLUSION OF ANY FURTHER ALTERNATE ROUTES IN THIS PATH AND FOR ENABLING THE SELECTION OF ONLY PREFERRED ROUTES BY THE ROUTING MEANS IN THE INTERMEDIATE OFFICES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |