Patent US3139536A successfully refreshed from Google Patents.
US3139536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low level transistor gating circuit
Assignee: AT&T Inc
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Filing: 1961-11-29
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Granted: 1964-06-30
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert K York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:22
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6257; H03K17/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A LOW LEVEL TRANSISTOR GATING CIRCUIT INCLUDING A FIRST TRANSISTOR AND A SECOND TRANSISTOR MEANS, FIRST IMPEDANCE MEANS CONNECTED TO SAID FIRST TRANSISTOR MEANS, SECOND IMPEDANCE MEANS COUPLING SAID FIRST AND SECOND TRANSISTOR MEANS, MEANS FOR BIASING SAID FIRST TRANSISTOR MEANS IN THE LINEAR AMPLIFYING REGION, INPUT SIGNAL MEANS CONNECTED TO SAID FIRST TRANSISTOR MEANS, SAID FIRST TRANSISTOR MEANS BEING RESPONSIVE TO THE ENERGIZATION OF SAID INPUT SIGNAL MEANS TO PRODUCE MUTUALLY OPPOSING OUTPUT SIGNALS, THE RESULTANT OUTPUT OF SAID SIGNALS BEING SUBSTANTIALLY ZERO, AND ADDITIONAL MEANS FOR ENERGIZING SAID SECOND TRANSISTOR MEANS TO BYPASS SAID SECOND IMPEDANCE MEANS, SAID FIRST TRANSISTOR MEANS BEING RESPONSIVE THEREAFTER TO THE ENERGIZATION OF SAID INPUT SIGNAL MEANS TO PRODUCE AN OUTPUT SIGNAL PROPORTIONAL TO THE SIGNAL DELIVERED BY SAID INPUT SIGNAL MEANS.
Claim 2
Dependent Claim
129 words
A LOW LEVEL TRANSISTOR GATING CIRCUIT INCLUDING A FIRST TRANSISTOR AND A SECOND TRANSISTOR MEANS, FIRST IMPEDANCE MEANS CONNECTED TO SAID FIRST TRANSISTOR MEANS, SECOND IMPEDANCE MEANS COUPLING SAID FIRST AND SECOND TRANSISTOR MEANS, MEANS FOR BIASING SAID FIRST TRANSISTOR MEANS IN THE LINEAR AMPLIFYING REGION, INPUT SIGNAL MEANS CONNECTED TO SAID FIRST TRANSISTOR MEANS, SAID FIRST TRANSISTOR MEANS BEING RESPONSIVE TO THE ENERGIZATION OF SAID INPUT SIGNAL MEANS TO PRODUCE MUTUALLY OPPOSING OUTPUT SIGNALS, THE RESULTANT OUTPUT OF SAID SIGNALS BEING SUBSTANTIALLY ZERO, AND ADDITIONAL MEANS FOR ENERGIZING SAID SECOND TRANSISTOR MEANS TO BYPASS SAID SECOND IMPEDANCE MEANS, SAID FIRST TRANSISTOR MEANS BEING RESPONSIVE THEREAFTER TO THE ENERGIZATION OF SAID INPUT SIGNAL MEANS TO PRODUCE AN OUTPUT SIGNAL PROPORTIONAL TO THE SIGNAL DELIVERED BY SAID INPUT SIGNAL MEANS.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |