Patent US3267387A successfully refreshed from Google Patents.
US3267387A
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Temperature and frequency stable amplifier
Assignee: Ampex Corp
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Filing: 1964-02-06
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Granted: 1966-08-16
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Expires: 1984-02-06
Abstract
No abstract record available.
Inventors
- 👤 Michael O Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:17
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A TRANSISTOR AMPLIFIER CIRCUIT COMPRISING: A FIRST TRANSISTOR OF THE GERMANIUM TYPE HAVING EMITTER, BASE, AND COLLECTOR, THE BASE OF THE FIRST TRANSISTOR BEING COUPLED TO RECEIVE SIGNALS TO BE AMPLIFIED BY THE CIRCUIT, A SECOND TRANSISTOR OF THE SILICON TYPE, OF THE OPPOSITE CONDUCTIVITY TYPE OF THE FIRST TRANSISTOR, AND HAVING EMITTER, BASE, AND
Claim 2
Dependent Claim
55 words
A TRANSISTOR AMPLIFIER CIRCUIT COMPRISING: A FIRST TRANSISTOR OF THE GERMANIUM TYPE HAVING EMITTER, BASE, AND COLLECTOR, THE BASE OF THE FIRST TRANSISTOR BEING COUPLED TO RECEIVE SIGNALS TO BE AMPLIFIED BY THE CIRCUIT, A SECOND TRANSISTOR OF THE SILICON TYPE, OF THE OPPOSITE CONDUCTIVITY TYPE OF THE FIRST TRANSISTOR, AND HAVING EMITTER, BASE, AND
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US2936427A
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US3192483A
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US2963656A
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US3200343A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |