US3215854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difference amplifier including delay means and two-state device such as tunnel diode
Assignee: RCA Corp
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Filing: 1962-01-26
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Granted: 1965-11-02
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Expires: 1982-01-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A DIFFERENCE AMPLIFIER COMPRISING, IN COMBINATION: TWO AMPLIFIER ELEMENTS, EACH HAVING A SIGNAL INPUT TERMINAL; AN OPERATING VOLTAGE SOURCE CONNECTED TO SAID AMPLIFIER ELEMENTS FOR CAUSING CURRENTS TO FLOW THROUGH SAID ELEMENTS; A TWO-STATE CIRCUIT ELEMENT CONNECTED TO SAID AMPLIFIER ELEMENTS FOR RECEIVING SUBSTANTIALLY THE SUM OF THE CURRENTS PASSING THROUGH THE TWO AMPLIFIER ELEMENTS; A DELAY MEANS CONNECTED BETWEEN SOLELY ONE OF THE AMPLIFIER ELEMENTS AND THE TWO-STATE CIRCUIT ELEMENT FOR RECEIVING THE CURRENT PASSING THROUGH SAID ONE AMPLIFIER ELEMENT;
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |