Patent US3234480A successfully refreshed from Google Patents.
US3234480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielded superwide-band high-frequency transistor amplifier
Assignee: Individual
•
Filing: 1961-08-30
•
Granted: 1966-02-08
•
Expires: 1981-08-30
Abstract
No abstract record available.
Inventors
- 👤 Maeda Hisao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A SUPERWIDE-BAND HIGH-FREQUENCY TRANSISTOR AMPLIFIER, COMPRISING A FIRST TRANSISTOR FOR AMPLIFYING INCOMING SIGNALS, A SECOND TRANSISTOR FOR RECEIVING THE AMPLIFIED SIGNALS FROM SAID FIRST TRANSISTOR, A PLURALITY OF PAIRS OF CLOSELY COUPLED PARALLEL-RESONANT PRIMARY AND SECONDARY NETWORKS EACH HAVING AN INDUCTIVE BRANCH AND A CAPACITIVE BRANCH, THE INDUCTIVE BRANCHES OF PAIRED NETWORKS BEING ELECTROMAGNETICALLY COUPLED, SAID PAIRS OF NETWORKS BEING TUNED TO DIFFERENT RESONANT FREQUENCIES WITHIN A PASS BAND TO BE TRANSMITTED, SAID PRIMARY NETWORKS BEING SERIALLY CONNECTED ACROSS THE OUTPUT OF SAID FIRST TRANSISTOR, MEANS INCLUDING A COUPLING CONDENSER
Claim 2
Dependent Claim
90 words
A SUPERWIDE-BAND HIGH-FREQUENCY TRANSISTOR AMPLIFIER, COMPRISING A FIRST TRANSISTOR FOR AMPLIFYING INCOMING SIGNALS, A SECOND TRANSISTOR FOR RECEIVING THE AMPLIFIED SIGNALS FROM SAID FIRST TRANSISTOR, A PLURALITY OF PAIRS OF CLOSELY COUPLED PARALLEL-RESONANT PRIMARY AND SECONDARY NETWORKS EACH HAVING AN INDUCTIVE BRANCH AND A CAPACITIVE BRANCH, THE INDUCTIVE BRANCHES OF PAIRED NETWORKS BEING ELECTROMAGNETICALLY COUPLED, SAID PAIRS OF NETWORKS BEING TUNED TO DIFFERENT RESONANT FREQUENCIES WITHIN A PASS BAND TO BE TRANSMITTED, SAID PRIMARY NETWORKS BEING SERIALLY CONNECTED ACROSS THE OUTPUT OF SAID FIRST TRANSISTOR, MEANS INCLUDING A COUPLING CONDENSER
References Cited (Backward Citations)
DE1069701B
Cited
US2164745A
Cited
US2298498A
Cited
US2270539A
Cited
US2480205A
Cited
US2981835A
Cited
DE1053588B
Cited
US3100282A
Cited
US2931988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |