Patent US4128809A successfully refreshed from Google Patents.
Patent US3124759A successfully refreshed from Google Patents.
US3124759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage transistor amplifier with
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:57
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A SIGNAL AMPLIFIER, A FIRST TRANSISTOR HAVING A BASE, AN EMITTER AND A COLLECTOR, A SIGNAL INPUT CONDUCTOR CONNECTED TO SAID EMITTER, A SECOND TRANSISTOR HAVING A BASE, AN EMITTER AND A COLLECTOR, A FIRST CONNECTION BETWEEN THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE BASE OF SAID SECOND TRANSISTOR, A SECOND CONNECTION BETWEEN THE BASE OF SAID FIRST TRANSISTOR AND THE EMITTER OF SAID SECOND TRANSISTOR, A SIGNAL OUTPUT CONDUCTOR CONNECTED TO THE
Claim 2
Dependent Claim
75 words
IN A SIGNAL AMPLIFIER, A FIRST TRANSISTOR HAVING A BASE, AN EMITTER AND A COLLECTOR, A SIGNAL INPUT CONDUCTOR CONNECTED TO SAID EMITTER, A SECOND TRANSISTOR HAVING A BASE, AN EMITTER AND A COLLECTOR, A FIRST CONNECTION BETWEEN THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE BASE OF SAID SECOND TRANSISTOR, A SECOND CONNECTION BETWEEN THE BASE OF SAID FIRST TRANSISTOR AND THE EMITTER OF SAID SECOND TRANSISTOR, A SIGNAL OUTPUT CONDUCTOR CONNECTED TO THE
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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |