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US3317677A
Expired / Lapsed
US
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Remote operator's position signaling system
Assignee: AT&T Inc
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Filing: 1963-11-26
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Granted: 1967-05-02
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Expires: 1983-11-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Chudkosky
- 👤 Robert C Nance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:56
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN COMBINATION, A TELEPHONE SWITCHING CENTER, A REMOTELY LOCATED OPERATOR POSITION, A PLURALITY OF SIGNALING TRUNKS EXTENDING BETWEEN SAID SWITCHING CENTER AND SAID OPERATOR POSITION, MEANS FOR DERIVING SPEECH CIRCUITS ON SELECTED ONES OF SAID SIGNALING TRUNKS, AND MEANS FOR
Claim 2
Dependent Claim
40 words
IN COMBINATION, A TELEPHONE SWITCHING CENTER, A REMOTELY LOCATED OPERATOR POSITION, A PLURALITY OF SIGNALING TRUNKS EXTENDING BETWEEN SAID SWITCHING CENTER AND SAID OPERATOR POSITION, MEANS FOR DERIVING SPEECH CIRCUITS ON SELECTED ONES OF SAID SIGNALING TRUNKS, AND MEANS FOR
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |