Patent US3121199A successfully refreshed from Google Patents.
US3121199A
Expired / Lapsed
US
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Virtual-earth amplifiers
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1960-11-01
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Granted: 1964-02-11
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Harrison Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186; G01; G01T; G01T1/00; G01T1/30; G21; G21C; G21C17/00; G21C17/14; G21C7/00; G21C7/36; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A DIRECT-CURRENT VIRTUAL-EARTH AMPLIFIER INCLUDING A FIRST RESISTOR CONNECTED BETWEEN ITS INPUT AND OUTPUT, HAVING SMOOTHING MEANS COMPRISING A FIRST CAPACITOR CONNECTED IN SERIES WITH A SECOND RESISTOR ACROSS THE FIRST RESISTOR, SAID FIRST CAPACITOR BEING CONNECTED TO THE OUTPUT
Claim 2
Dependent Claim
40 words
A DIRECT-CURRENT VIRTUAL-EARTH AMPLIFIER INCLUDING A FIRST RESISTOR CONNECTED BETWEEN ITS INPUT AND OUTPUT, HAVING SMOOTHING MEANS COMPRISING A FIRST CAPACITOR CONNECTED IN SERIES WITH A SECOND RESISTOR ACROSS THE FIRST RESISTOR, SAID FIRST CAPACITOR BEING CONNECTED TO THE OUTPUT
References Cited (Backward Citations)
US2777905A
Cited
US2937369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |