US3086083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuit
Assignee: AT&T Inc
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Filing: 1958-10-23
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Granted: 1963-04-16
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Expires: 1978-10-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Feder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:05
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; H04; H04J; H04J3/00; H04J3/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
IN A TIME DIVISION TELEPHONE SYSTEM A SWITCHING NETWORK COMPRISING A PLURALITY OF INDIVIDUAL LINES, A SINGLE LINE, A GATE CIRCUIT CONNECTING EACH OF SAID PLURALITY OF LINES TO SAID SINGLE LINE, EACH OF SAID GATE CIRCUITS COMPRISING A PAIR OF SEMICONDUCTIVE DEVICES EACH HAVING AT LEAST FOUR ZONES OF ALTERNATELY OPPOSITE TYPES OF SEMICONDUCTIVE MATERIAL, MEANS CONNECTING SAID DEVICES IN SERIES, INDUCTANCE MEANS CONNECTED BETWEEN ONE END ZONE OF EACH OF SAID DEVICES AND A CORRESPONDING ONE OF SAID INDIVIDUAL LINES, THE OTHER END ZONE OF EACH OF SAID DEVICES BEING CONNECTED TO SAID SINGLE LINE, AND MEANS FOR APPLYING SIGNAL PULSES SELECTIVELY TO SAID DEVICES THROUGH SAID SERIES CONNECTION TO SELECTIVELY CONTROL THE COMPLETION AND INHIBITION OF SIGNAL PATHS FROM SAID INDIVIDUAL LINES TO SAID SINGLE LINE.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |