US3254303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascaded transistor amplifier biasing arrangement
Assignee: AT&T Inc
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Filing: 1963-09-27
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Granted: 1966-05-31
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Expires: 1983-09-27
Abstract
No abstract record available.
Inventors
- 👤 Sherman T Brewer
- 👤 Robert G Buus
- 👤 Julius J Kassig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:46
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A SIGNAL REPEATER FOR A COMMUNICATION LINE HAVING AN INCOMING SECTION AND POWER SEPARATION FILTER DELIVERING A SUBSTANTIALLY CONSTANT DIRECT CURRENT VIA A FIRST CONDUCTOR AND A COMMUNICATION SIGNAL BETWEEN A SECOND CONDUCTOR AND THE FIRST CONDUCTOR AND HAVING A OUTGOING SECTION AND POWER SEPARATION FILTER RECEIVING THE DIRECT CURRENT VIA A THIRD CONDUCTOR AND THE AMPLIFIED SIGNAL BETWEEN A FOURTH CONDUCTOR AND THE THIRD CONDUCTOR, COMPRISING FIRST, SECOND, THIRD AND FOURTH TERMINALS CONNECTABLE TO THE FIRST, SECOND, THIRD, AND FOURTH CONDUCTORS, RESPECTIVELY; A FIRST TRANSISTOR HAVING A FIRST EMITTER ELECTRODE CONNECTED TO SAID FIRST TERMINAL, A FIRST BASE ELECTRODE COUPLED TO SAID SECOND TERMINAL, AND A FIRST COLLECTOR
Claim 2
Dependent Claim
109 words
A SIGNAL REPEATER FOR A COMMUNICATION LINE HAVING AN INCOMING SECTION AND POWER SEPARATION FILTER DELIVERING A SUBSTANTIALLY CONSTANT DIRECT CURRENT VIA A FIRST CONDUCTOR AND A COMMUNICATION SIGNAL BETWEEN A SECOND CONDUCTOR AND THE FIRST CONDUCTOR AND HAVING A OUTGOING SECTION AND POWER SEPARATION FILTER RECEIVING THE DIRECT CURRENT VIA A THIRD CONDUCTOR AND THE AMPLIFIED SIGNAL BETWEEN A FOURTH CONDUCTOR AND THE THIRD CONDUCTOR, COMPRISING FIRST, SECOND, THIRD AND FOURTH TERMINALS CONNECTABLE TO THE FIRST, SECOND, THIRD, AND FOURTH CONDUCTORS, RESPECTIVELY; A FIRST TRANSISTOR HAVING A FIRST EMITTER ELECTRODE CONNECTED TO SAID FIRST TERMINAL, A FIRST BASE ELECTRODE COUPLED TO SAID SECOND TERMINAL, AND A FIRST COLLECTOR
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |