US3118974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching telephone system
Assignee: TDK Micronas GmbH
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Filing: 1959-09-01
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Granted: 1964-01-21
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Expires: 1979-09-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur J Radcliffe
- 👤 Thomas A Pickering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6285; H03K17/6257; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
CONTROL MEANS FOR OPERATING SPACED APART SWITCHING ELEMENTS OF AN AUTOMATIC TELEPHONE SYSTEM COMPRISING MEANS FOR REGISTERING INFORMATION SIGNALS, MEANS FOR PROVIDING A PLURALITY OF CYCLICALLY RECURRING TIME FRAMES, MEANS FOR COMPARING SAID REGISTERED INFORMATION SIGNALS WITH SAID RECURRING TIME FRAMES, MEANS RESPONSIVE TO SAID COMPARING MEANS FOR DETECTING A PARTICULAR ONE OF SAID TIME FRAMES, AND MEANS FOR DIRECTING SAID AUTOMATIC TELEPHONE SYSTEM TO EXTEND CALLS THROUGH AT LEAST ONE OF SAID SPACED APART SWITCHING ELEMENTS DURING SAID DETECTED TIME FRAME.
References Cited (Backward Citations)
US2667540A
Cited
US2739185A
Cited
GB735635A
Cited
US2912510A
Cited
US2854316A
Cited
US2898406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |