Patent US3123777A successfully refreshed from Google Patents.
US3123777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D thomas
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:41
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03F; H03F3/00; H03F3/50; H03F3/52; H03F5/00; H03G3/30; H03G3/3052; H03G3/3078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A GAIN-CONTROL CIRCUIT FOR A HIGH-FREQUENCY AMPLIFIER; SAID AMPLIFIER COMPRISING: A FIRST AMPLIFYING DEVICE HAVING A CATHODE, A GRID, AND AN ANODE, SAID GRID BEING GROUNDED; A SECOND AMPLIFYING DEVICE HAVING AN INPUT ELECTRODE, AN OUTPUT ELECTRODE, AND A THIRD ELECTRODE; MEANS TO APPLY AN INPUT SIGNAL TO SAID CATHODE; A SOURCE OF GAINCONTROL VOLTAGE; MEANS TO COUPLE SAID GAIN-CONTROL SOURCE TO SAID INPUT ELECTRODE; MEANS TO COUPLE SAID ANODE TO SAID INPUT ELECTRODE; A SOURCE OF D.C. POTENTIAL; MEANS TO COUPLE SAID THIRD ELECTRODE AND SAID CATHODE TO SAID D.C.
Claim 2
Dependent Claim
91 words
A GAIN-CONTROL CIRCUIT FOR A HIGH-FREQUENCY AMPLIFIER; SAID AMPLIFIER COMPRISING: A FIRST AMPLIFYING DEVICE HAVING A CATHODE, A GRID, AND AN ANODE, SAID GRID BEING GROUNDED; A SECOND AMPLIFYING DEVICE HAVING AN INPUT ELECTRODE, AN OUTPUT ELECTRODE, AND A THIRD ELECTRODE; MEANS TO APPLY AN INPUT SIGNAL TO SAID CATHODE; A SOURCE OF GAINCONTROL VOLTAGE; MEANS TO COUPLE SAID GAIN-CONTROL SOURCE TO SAID INPUT ELECTRODE; MEANS TO COUPLE SAID ANODE TO SAID INPUT ELECTRODE; A SOURCE OF D.C. POTENTIAL; MEANS TO COUPLE SAID THIRD ELECTRODE AND SAID CATHODE TO SAID D.C.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |