US3134055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage level detector circuits
Assignee: AT&T Inc
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Filing: 1961-12-04
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Granted: 1964-05-19
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Cronier Richard E Le
- 👤 Michael I Rackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A VOLTAGE LEVEL DETECTOR COMPRISING A PLURALITY OF FERREEDS EACH HAVING TWO WINDINGS, MEANS SERIALLY CONNECTING ONE WINDING OF EACH OF SAID FERREEDS BUT ONE WITH ONE WINDING OF ANOTHER OF SAID FERREEDS, INPUT VOLTAGE MEANS COUPLED TO THE WINDINGS OF SAID FERREEDS, AND MEANS INDIVIDUALLY CONNECTED TO EACH OF SAID SERIALLY CONNECTED WINDINGS FOR CONTROLLING CURRENT FLOW THROUGH DIFFERENT GROUPS OF SAID SERIALLY CONNECTED WINDINGS RESPONSIVE TO RESPECTIVE INPUT VOLTAGES.
Claim 2
Dependent Claim
71 words
A VOLTAGE LEVEL DETECTOR COMPRISING A PLURALITY OF FERREEDS EACH HAVING TWO WINDINGS, MEANS SERIALLY CONNECTING ONE WINDING OF EACH OF SAID FERREEDS BUT ONE WITH ONE WINDING OF ANOTHER OF SAID FERREEDS, INPUT VOLTAGE MEANS COUPLED TO THE WINDINGS OF SAID FERREEDS, AND MEANS INDIVIDUALLY CONNECTED TO EACH OF SAID SERIALLY CONNECTED WINDINGS FOR CONTROLLING CURRENT FLOW THROUGH DIFFERENT GROUPS OF SAID SERIALLY CONNECTED WINDINGS RESPONSIVE TO RESPECTIVE INPUT VOLTAGES.
References Cited (Backward Citations)
US3005072A
Cited
US3041469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |